A woman's long-term relationship is faltering, and she's shaken when her friend announces her engagement to the woman's former lover. On a business trip to Busan, she meets a charming but unfaithful man who tries to win her over, leading to a journey of self-discovery and unexpected connections.

Mood of the Day
A train journey from Seoul to Busan sets off a life-changing sequence of events for a philandering man and a woman feeling trapped in her relationship.