An aging scientist named Dr. Kochin uses the Dragon Balls to wish his colleague, Dr. Willow, free of the icy tomb that imprisons him. Willow's body has died, but his brain survives in a robotic shell. His ambition is to take over the world by combining his brain with the body of the world's strongest man.
Initially, they mistake Kame Sennin to be this man, and they kidnap him, Piccolo, and Buruma. Goku, Gohan, and Kuririn come to rescue their friends, and are confronted with the mad scientist's powerful robots. Kochin and Willow soon discover that it is Goku after all who is the strongest man alive, but their efforts to take over his body fail. The robots are destroyed, Kochin is killed, and Willow decides that Goku is too strong. He attempts to destroy the Earth, but Goku counters the massive blast with a Genkidama, which atomizes Willow and his dark ambitions.
THE TREE OF MIGHT
Bulma, Oolong, and Kuririn take Gohan camping in the forest, and while there, a space probe crashes into the Earth and a fire erupts. Gohan and Kuririn put it out, but not before the forest is destroyed. They gather all seven Dragonballs and summon Sheng Long, who restores the forest to its former beauty. Gohan befriends a baby dragon, and life goes peacefully until a band of warriors led by a Saiya-jin named Tales arrive on Earth. Their probe has reported that it is the perfect planet to grow the Shinseiji, a tree that leeches all the energy from a planet and stores it in its fruit, which, when eaten, makes one incredibly powerful. It also leaves the host planet barren for hundreds of years, unable to support even a single flower.
Goku learns of the Shinseiji from Kaiou, and the fight begins as Goku, Tenshinhan, Chaozu, Piccolo, Yamucha, and Kuririn set out to destroy the tree before it saps all energy out of the Earth. Tales' minions are all eventually defeated, and Goku then takes on Tales alone, who has been superpowered by the fruit of the tree. After a long, draining battle, Goku finally defeats him with a Genkidama containing the last of the planet's energy. Tales and the tree are destroyed, and the planet returns to its healthy state.
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