In a dystopian future, the Japanese people are governed by the Battle Royale act, a law that forces a class of 9th-grade students into a fight to the death on a remote island. Each of them has a simple choice: kill or be killed.
A junior high-school student struggling with the death of his father, is forced to participate in a death game made by the government, in which he is taken to a deserted island with 41 of his school mates, who must kill each other in order to win.