Duri Jae-sung is a very close friend of fellow North Korean defector Kang Sae-Byeok, where he decides to help her until taking part in a game with a strange man with a suitcase until he got a card. Duri accepts the offer of the strange man until he is transferred to a strange room, where he sees other players in weird track suits like he is, same with his best friend. The two try to survive as many games as they possibly could, but Sae-Byeok start having feelings for Jae-sung, does he feel the same?