Gohan is a grown young man who goes on his first day of high school. He is then faced with three robbers trying to rob a bank but Gohan quickly goes super saiyan and beats up the guys but the mysery still stand about this guy and Gohan is amazed of hearing people talk about him like this. But with his ability to rescue people, he decides to go to Bulma who makes him a costume. Gohan calls himself "Saiyaman". When Videl, Hercules' daughter hears about this she suspects this is Gohan's idea. She tries to uncover Gohan's secret and succeeds enough to have Gohan to train her and Goten, Gohan's brother how to fly which they master after 2 months. Goku tells Vegeta that he'll be returning back to earth as well.And after days of training, Gohan, Trunks, Piccolo, Vegeta, Trunks (Vegeta's son), Goten,Videl and many others meet in the tournament but there are also some very strong guys and they are talking serious power here.............Can Gohan and the others beat these guys as they celebrate Goku's return?

The tournament begins with a new twist Trunks and Goten being in the Junior divisions since they are under 15yrs of age. Goten and Trunks fight in the finals anyways. The fight looked completely even between Trunks and Goten until when Goten made a sudden mistake which costed him to loose the fight to Trunks. Trunks was then given the chance to fight the current champ, Hercule which didn't take long with Trunks being the victor. As the adult division began, Trunks hatched a plan to take on maskman and take all of their clothes and disguise as him. Goku and the others meet up with Kibito and Shin who seemed as a threat to the Z warriors in the future. The fights starts and its Vegeta vs. Goku at the 6th round.............unbelievable huh!The fight between Krillin and Bigman doesn't take long with Krillin winning. Next, its Piccolo vs. Shin. At the begining Shin scares Piccolo away making Piccolo to forfeit. Next, its Videl vs. Spopovitch. Videl starts off well beating Spopovitch up but when it becomes clear that Videl's attacks are not working its a nightmare for everybody as the watch Videl being brutally beaten by Spopovitch who gets stopped by his friend, Yamu. Goku goes to Korin and brings the Senzu beans for Videl. Next up, its Gohan vs. Kibito. Gohan stunts his on lookers by transforming to supersaiyan 2 as a request from Kibito. But Yamu and Spopovitch jump into the field absorbing Gohan's energy and running away with it. Gohan reveals to his friends that he was the golden warrior and was also the saiyaman. Shin reveals that he is the supreme Kai and Kibito his guardian. What are Yamu and Spopovitch going to do with Gohan's energy?

Kibito and Shin follow and so does the other z warriors who hear about Babidi's past and his quest for revenge. Babidi is a son of Bibidi, the creator of the majin company. Bibidi created a monster named Majin Buu and his aim to destroy the entire universe. Ten times powerful than Frieza, Buu destroyed planets in the blink of an eye. He became rebellious destroying Bibidi who borned Babidi to carry out his plan and he was too young to do so, so Shin blocked majin Buu in a caccoon under the surface of the earth for so many centuries and now that Babidi has mastered his powers he is ready to take back what belong to him! Shin and the others reach the hiding place for Babidi's ship and realizing that the King of Demons, Dabura was also under Babidi's spell. Dabura quickly killed Kibito and froze Piccolo and Krillin into stones by spitting on them. Goku, Gohan, Vegeta and Shin later went in to he ship facing mutants like Yakon and Pui-Pui who were easily beaten by Goku and Vegeta. Babidi gets worried but Dabura agrees to fight Gohan next and does with Vegeta getting angered of Gohan's mistakes. Vegeta's angers makes Dabura to realize something about Vegeta. Meanwhile back at the stadium, Hercule arranges a bttle royale with the remaining five fighters. The fights starts and it becomes #18 vs Maskman (Goten and Trunks disguised) and after a certain transformation to supersaiyan, #18 realizes that both warriors, Goten and Trunks were the ones fighting her so she ends it making both Goten and Trunks disqualified and they left.Its #18 vs. Hercule but after seeing #18's powers, Hercule begs for mercy and in secret, #18 makes a deal with Hercule. Back at Babidi's spce ship, Vegeta becomes a target for a much bigger plan............turning him into the dark side and Babidi succeeds. Goku and the others are then transported back to the martial arts stadium where Vegeta kills millions of innocent lives to get Goku to fight with him and Goku agrees to it if the fought in a different location away from people and Babidi changes directions to a deserted area. Gohan and Shin go to the lowest level of the ship to face Babidi and Dabura. Goku and Vegeta continue fighting but all the energy Goku looses goes to majin Buu's power making him even more powerful than before. Atlast the horrible power comes out and majin Buu hatches out. He is smily, happy and lovable creature and no person believes that this creature is the most dangerous creature in the universe but can the Z warriors take on majin Buu before its too late.

Majin Buu quickly turns into a destructive warrior when Dabura makes a joke about Buu. Gohan escapes only to be caught by majin Buu. The fight with Goku and Vegeta with Vegeta wins due to Goku letting his guard down in trusting Vegeta. Gohan is nearly killed even after transforming to supersaiyan 2. Shin is next to die but with a desperate move, Dabura is turned to chocolate by majin Buu and eaten. Just when Shin is about to be eaten a blast destroys Babidi's ship. Krillin and Piccolo return back to their normal bodies and Goten and Trunks arrive to see that Vegeta is the one coming to save the day. Vegeta powers up like never before to super saiyan 2 in an attempt to beat Buu head on and fails but when Trunks tells Goten about Vegeta being a saiyan Prince, Vegeta hugs Trunks for the first time and does a sacrifice for every one on earth in an attempt to explode majin Buu forever but doesn't succeed. Majin Buu regenerates himself and goes on having fun destroying cities with Babidi. Piccolo and Krillin regroup back with Goten and Trunks for safety at Kami's lookout where Dende and Mr. Popo have been watching the fight. Shin finds Gohan under a tree after a desperate attempt to find for him. Goku appears to be alive and as he gets to Kami's lookout and is told about the current events Goku decides to bring back all the loved ones to the lookout. Goku realizes that Bulma already has summoned the dragon and brought back every one from death including Kibito who later finds Shin and Gohan and take them to the Kai planet. Goku takes Bulma and the others to the lookout after telling the dragon to come back later. Babidi finds out where Trunks is hiding at Capsule Corp. and decides for him and Buu to go there. Goku decides to go on and stop majin Buu meanwhile Trunks went by himself to find the dragonball radar. This leads to Goku transforming to supersaiyan 3. Goku has the advantage through out the whole battle and tells majin Buu to stop listening to Babidi and atlast Buu kills Babidi making him free todo his own biding. Goku starts to teach the fusion technique to Goten and Trunks and later leaves for his time on earth was out. Gohan trains with the legendary Z sword and even breaks freeing one of ancients most oldest and wisest Kais. He decides to build up Gohan's powers. Meanwhile back on earth, Goten and Trunks train under Piccolo who later fuse into the arrogant Gotenks. Gotenks decides to go on and fight majin Buu in normal state and looses. Buu helps out a kid showing his good side. Hercule comes in hoping to kill majin Buu but with fear he becomes Buu's cook. Quickly Buu becomes a kind and lovable creature again. Meanwhile Gotenks learns how to transform to super saiyan and goes when his fusion defuses. Majin Buu decides to not kill any longer. Does this mean there is peace on earth at last?

Majin Buu begins his new life which ends in a tragedy. Majin Buu divides into two: One good and one evil. Its Buu vs Buu and the evil one wins turning the good Buu into Chocolate and eating him to transform to an evil warrior who knew no equal. This form was called "Evil Buu". After scaring Hercule, he travels to Kami's lookout and forces Piccolo to awaken Goten and Trunks togo for training. After several confrontations, majin Buu decides to give the z warriors one hour to train. After 45 minutes, Buu decides to go into the chamber where he found Goten and Trunks and the learned how to fuse without using any of their powers. Gotenks was reformed again and was stronger than ever but as he began to learn his attacks wern't working on majin Buu even when he transformed to super saiyan, it was still the same situation until when he did the super ghost attack which had an effect on majin Buu but he regenerated back again. Gotenks was hiding an attack and decided to fool Piccolo that he was out of power making Piccolo to blast the door making all of them to stuck inside for the rest of eternity. Gotenks yells at Piccolo for this but Buu's anger makes a portal that makes him travel back to the living world and he turned everyone to food and eating them. Inside the time chamber, Gotenks transforms to super saiyan 3 and makes his own portal enough to last as long as Buu's to get back to earth only to find out that everyone was dead. Gotenks' rage turns out to be a fight against Buu whom he becomes Buu's equal. After a while of fighting, Gotenks starts to win the whole fight and just when he's about to finish Buu off, his fusion difuses making Goten and Trunks a plaything to majin Buu. All hopes are lost until when Gohan returns back to earth powerful than ever in a form known as the mystical super saiyan. This level was even more powerful than super saiyan 3 itself. GOhan beat Buu and after an attempt to destroy Gohan, Buu exploded buying himself some time. Gohan, Piccolo, Goten and Trunks found Hercule with the pet and later found Dende who told how he survived majin Buu and after an hour Buu was back and absorbed the newly fused supersaiyan3 Gotenks and Piccolo making him invisible. Buu tortured Gohan and made sure that he was dead but with many close calls, Gohan kept coming back until when Tien angered him to make a blast for the target earth. On the Kai planet elder Kai gives Goku Kai earings for a faster fusion with Gohan. Kibito and Shin then try to fusion to become Kaioshin. Goku arrives on earth justn in time to save the earth and buys time for Gohan to wear the earing for fusion. But Buu's power decreases rapidly after Gotenks' defusion. Goku is more powerful than him. Outsmarting Goku, Buu absorbs Gohan and becomes an even more powerful warrior. Goku has no hope but senses another energy..........its Vegeta but after escaping majin Buu to Vegeta, Buu, Hercule, Dende and the pet follow Goku and luring Vegeta to fuse with Goku becomes a difficult task. After seeing all odds, Vegeta agrees to a permanent fusion with Goku. His name is Vegetto and he is more powerful than majin Buu.He starts to fight Buu in his normal state and becomes Buu's equal and when he transforms to a super saiyan form he is powerful than majin Buu. Buu eats up Vegetto and its a defusion in the body as they go in adventures against their own bodies and majin Buu. They succeed going out of Buu's body. Vegeta and Goku start to think that Buu's body is going to weaker but instead he becomes strionger than ever. Now there is a new form of majin Buu and he is unbeatable, his name "Kid Buu" . He destroys planet earth and travels thru space destroying other places as well in search for Goku and Vegeta who escaped the explosion on earth and were at the Kai planet. When Buu reached the Grand Kai planet where Krillin, Yamcha and the kais were there training, Goku and Vegeta powered up to lure majin Buu Buu to the Kaishin planet which worked. Buu began his fight with Goku and SSJ3 Goku was an equal to Buu and soon he was worn out. Needing time recover, Vegeta jumps in to fight but Buu becomes too much for him. Hercule jumps in, just when they are begining to fight, Good Buu appears and fights against him. As they fight, Vegeta hatches a plan. Vegeta tells Dende to summon the Namekian dragon and to wish for the earth and the people to be brought back to life and its done. For the next plan, Vegeta tells eveyone on earth to raise their hands up for the spirit bom which was done by Goku.........one big problem..no one except for loved ones gave their energy. After almost loosing hope, Hercule steps in tells the earthlings to give their power and they do making the bom larger than ever. Goku launches the spirit bom for final acts but majin Buu deflects it but when Dende wished for Goku's powers to be restored Goku takes control and destroying majin Buu once and for all.

Buu is gone but the good Buu is still alive who attends a tournament which holds with the other z warriors in it. Trunks and Goten are grown up and Gohan is married to Videl and has achiled named Pan. At the tournament, Goku faces the reincarnation of Kid Buu which is electrifying ending up in a draw. Goku takes Uub for training him how to control his power and its the end of dragonball Z