A
forest fire interrupts a camping trip enjoyed by
Gohan,
Krillin,
Bulma and
Oolong. Gohan and Krillin manage to put out the fire and use the Dragon Balls to restore the forest and the animals killed by the inferno, and Gohan befriends a small
dragon he names Icarus. Unbeknownst to the group, the fire was started by a probe sent by a Saiyan space pirate named Turles, who bears a striking resemblance to
Goku and who has chosen the Earth to plant the tree of might, which absorbs the life of a planet and converts it into fruit that when eaten, gives the consumer a massive power increase. Turles'
henchmen plant the seed, and
King Kai telepathically warns Goku of the danger. He, Krillin,
Yamcha,
Tien Shinhan, and
Chiaotzu attempt to destroy the tree using
energy blasts but fail. Turles' henchmen attack and overwhelm them. The Earth begins to succumb to the devastation of the tree's life absorption as water vanishes, and plants and animals perish. After Gohan fights back against the henchmen, Turles enters the fray after realizing Gohan is half-Saiyan and deduces that he is Goku's son, who he states is from the same class of Saiyan warrior, and thus explains their similar appearances. Gohan impresses Turles with his power level and invites him to join his conquest. Still, he refuses and attempts to fight Turles before
Piccolo intervenes to rescue him. Turles forces Piccolo to protect Gohan, and the Namekian is dispatched. Upon noticing Gohan's regrown tail, Turles creates an artificial moon and forces Gohan to observe it, causing him to transform into a great ape (oozaru), who attacks Goku but is calmed by the appearance of Icarus. Turles injures Icarus with an energy blast, causing Gohan to go into a frenzy before Goku severs his son's tail with an energy disc, transforming him back to normal and saving him from Turles' incoming energy blasts. Goku kills Turles' henchmen and engages his evil
doppelganger in battle. Goku has the upper hand against Turles until he obtains a fully grown piece of fruit from the Tree of Might and consumes it. With the sudden surge of power, Turles overwhelms Goku until his allies come to his aid. As they fight Turles with limited success, Goku begins to form a Spirit Bomb, but the Earth, having been drained by the Tree of Might, does not have the energy left to fuel Goku's Spirit Bomb, which Turles destroys. However, the energy from the Tree of Might flows into Goku, allowing him to create another, more powerful Spirit Bomb. Goku confronts Turles underneath the tree's roots and blasts him directly with the attack, launching him up the tree and destroying them both. The Earth begins to heal as the heroes celebrate their victory. Piccolo meditates alone by a waterfall. ==Cast==