Be careful what you wish for. Ryouta Sakamoto has suddenly been transferred in to a deadly high stakes game. A game he is all too familiar with. Left on a mysterious island with a set of provisions, a bag of bombs and a strange crystal embedded into his left hand - this is the world of Btooom realized. Beautifully replicated, this game of Btooom is an all out dog eat dog world, where to escape you will need to kill seven others before they kill you. But there's a difference between a game and reality. When a death is a death and there are no second lives, Ryouta is about to learn the value of a life.