Law Of Ueki. A group of mighty beings called the Tenkaijin are holding a special tournament. The rules of the game — each tenkaijin selects a junior high child to be his champion and gives him special strength. The children face each other in a heated fight, but if they injure innocent people, they lose one of their natural abilities. Every time they win a battle, they gain new abilities. The ultimate winner of the tournament is granted any power of his choice, and the tenkajin he represents succeeds in becoming the next god. Kosuke Ueki was selected to serve in the tournament. His special power — the ability to turn garbage into trees.