Sakamoto Ryota is an unemployed 22 year old who lives at home and does nothing but play video games. In the real world, there may be nothing special about him, but online, he's one of the world's top players of the combat game called BTOOM. One day, he awakes on a tropical island, though he has no memory of how he got there. After a man attacks him, Ryota realizes he's been trapped in a real-life version of his favorite game. Ryota and the other "players" must now survive through this nightmare to figure out how to escape the island.