History will tell us about the 22 -year-old Sakamoto Rёta - slacker who lives with his mother. Perhaps in his life he and gray mouse (or rat)but among gamers quite a famous person, especially as one of the best world-class players in the most popular online game «Btooom!». But life is boring without surprises. And Rёta also gets a surprise. Waking up one morning, he finds himself in an unknown island. And what is bad, he can not understand,which is no easy it brought it here. As a result, he is forced to go in search of out of this situation. And so, after wandering for some time on the island, Rёta stumbles upon a stranger, which makes it a "gift" in the form of thrown grenades into it. Then Rёta understand two very important things: first - it wants to killand the second - it turned out to be the world`s «Btooom!» favorite games.