Ha-young, a month away from her wedding, follows her fiancé on a business trip to Singapore. However, she witnesses him cheating on her with her best friend, leaving her devastated and betrayed. In a moment of drunken impulse, she ends up spending the night with a stranger - Seo-jun.

Ha-young tought it was just a one-night relationship until Seo-jun unexpectedly appeared in front of her again in Korea. Moreover, Seo-jun begins chasing her and attempts relationship.