A seed of the Tree of Might has been planted on Earth by a group of space pirates. Once rooted, the Tree of Might will devour all life energy, leaving the planet a deserted land where no living thing can survive. Goku and his friends are the last hope...can they defeat the evil space pirates and Turles, the evil leader of the group and a Saiyan!? And if that wasn't trouble enough, Turles powers up by eating a fruit of the tree, and challenges Goku. Can Goku save Gohan and the planet Earth from Turles?