This movie starts off with Piccolo training in an icy mountain range, unable to so much as crack the stubborn, rigid, and enormous things.

Gohan and Oolong are in search of the Dragonballs, with Oolongs goal to wish for panties. They notice that all the Dragonballs are gathering in one place, via looking at the Dragon radar. They approach their destination slowly, and get closer and closer.

Meanwhile, an old, frail man named Dr. Kochen is the one who collected all the Dragonballs, and has set them up on top of an icy cavern. He calls out Shenron, and wishes for the ice to be melted so his mentor, Dr Willow, could finally be released from his tomb. Using incredible power, Shenron grants the wish, then disappears, along with the Dragonballs. A huge structure rises, and Dr. Kochen makes his evil intentions clear.

Gohan and Oolong wander along, when suddenly a group of creatures attack them, pushing Oolong out of the way, and beating Gohan to a pulp. Piccolo steps in though, and rescues his friend, easily defeating all of the saibamen-look-a-likes. Gohan loses grasp of his consciousness, and fades away. Piccolo looks around, then is hit by some sort of red aura soaring out of the ground, putting him in a great deal of pain.

Gohan and Oolong wake up, hurt only slightly, and wondering where Piccolo has gone. They assume he went home, and they do the same.

On Roshi’s island, Bulma and Oolong are in the kitchen, cooking intently. The doorbell rings, and turtle answers it. The saibamen-look-a-likes are here for Roshi! The old man comes out, and makes it clear that he has no interest in fighting. He doesn’t have a choice though, and the three creatures jump on him, trying to hurt him, but failing miserably, as Roshi easily beats them across the floor. He turns to walk off, but a man claps. It’s Kochen! He tells Roshi that it is just what he expected from the strongest man in the world, and that he is going to accompany him to Dr Willow. Roshi explains that he doesn’t want to go, but the saibamen creatures have captured Bulma, threatening to harm her if Roshi doesn’t co-operate. He has no choice but to go with them.

Goku finds out what has happened, and sets off on his nimbus, to find and rescue both Bulma and Roshi.

Roshi stand in darkness, with Bulma chained up, unable to escape. Kochen releases three bio warriors, with a short fight ensuing. Roshi is the eventual loser of this though, with the bio warriors being far too powerful for him.

Bulma informs Kochen that Roshi isn’t the strongest man in the world anymore, so they should leave him alone. Dr Willow now speaks, and demands to know who the worlds strongest is. Bulma remembers them by name, and says that they should have died in an avalanche. Kochen reveals Dr Willow, a huge brain floating in water, and tells that his body as destroyed in the avalanche, but his brain was able to survive. Bulma is astounded, then tells them both that Goku is now the strongest fighter in the world. Dr Willow and Dr Kochen reveal that Willow will take Goku’s body, and insert his great mind into it, making the most powerful person in the universe. Willow reveals that his plan is for revenge, like so many other villains.

Goku finally arrives, with Dr Willow noticing his incredible power. He steps up to the door, but is attacked by a large, yellow monster. It is one of the bio warriors that defeated Roshi! Goku has to run inside because he is unable to gain any power due to the terrible coldness of the buildings location. He moves into a far warmer room, with the fat yellow monster in hot pursuit. He stops, and battles with the monster for a while, eventually managing to defeat him by ripping through his huge, flexible stomach with the use of a kai-o-ken power up. He moves so fast that after he bursts through the monsters stomach, he goes straight through the roof, and into a new room.

He meets two more bio warriors here, and after a fairly large fight, he manages to beat them, with more than a little help from Gohan and Krillen. Goku moves into the main chamber, and located Dr Willow. Before he can do anything though, Piccolo steps in front of him, with some sort of yellow veins on his head. The two are forced to fight, with Goku not understanding why Piccolo is doing this. Gohan keeps foolishly getting in the way, and getting beat up by Piccolo. Gohan gets so mad that he releases surges of energy, with such force that they make the veins on Piccolo’s head disappear, and Dr Willow hurt badly.

Dr Willow is mad at this, and stands up, creating a huge gap in the ground, which Dr Kochen falls down, revealing himself to be nothing more than a robot. Willow is in a huge mechanical suit, and easily beats up the combo of Goku, Gohan, Piccolo, Roshi, and Krillen, with the size of all of them put together, and then some. He puts a beating on everyone, but in the end Goku comes through, with an incredibly powerful KameHameHa, with having such force that Dr Willow is shot straight through the roof of the building, into the depths of space. Goku knows it’s not over though, and begins charging up a spirit bomb. Willow recovers, and begins to charge up an attack of his own. He shoots it down, as everyone but Goku run out of the collapsing building. Goku finishes his spirit bomb, but is unable to throw it due to being pummelled by the power of Willow’s energy beam. Everyone thinks that it is over, as Gohan and Piccolo fly up towards Willow in fits of rage, later joined by Krillen. They rough up the evil mastermind for a while, before he shoots an incredible beam of energy down at the Earth, hoping to destroy it. Luckily though, Goku has somehow recovered, and charged up a spirit bomb. He throws it up, intercepting the beam, and pushing it back, eventually destroying Dr Willow.

And so the bad guy is dead, and the world is saved from the depths of turmoil once again by Goku and the others.