Eighteen-year-old Ryohei Arisu is sick of his life. School sucks, his love life is a joke, and his future weighs on him like impending doom. As he struggles to exist in a world that can't be bothered with him, Ryohei feels like everything would be better if he were anywhere else. When a strange fireworks show transports him and his friends to a parallel world, Ryohei thinks all his wishes have come true. But this new world isn't an empty paradise, it's a vicious game. And the only way to survive is to play.

After stumbling on a dealer's bunker, Arisu is even more determined to uncover the terrible truth behind Borderland. But that means he and Usagi will have to abandon their plans to sit out the games and instead seek out the last person who might have the answers--the Queen of Hearts. Will taking on the queen find them a way home, or will it be their final game?