Some games are dangerous and some memories unreliable. The duo, each has their own aims, set out to finish the cursed game.

Zian leads a boring life with her boyfriend. One day, a strange woman appears in Zian's life. Manipulated by that woman, Zian begins to change.

When Wu Yuenu slips into a coma after a car accident, memories come rushing back to her. She arrives in the Sailing Castle, meeting those from Monday to Saturday.