The story picks up where the first part left off, with Shin-a (Shin Min-a) and Da-mi (Kim Da-mi) as adults. Shin-a, now a skilled fighter, works as a bodyguard for a wealthy family, while Da-mi leads a more ordinary life. However, their lives are turned upside down when they are forced to confront their past and a new threat emerges in the form of a mysterious organization.