Kim Shin, who is about to get married, meets his fiancée’s twin sister. Although she has the same face as her older sister, Kim Shin finds himself drawn to the pure and feminine twin. However, being timid and kind-hearted, he tries hard to deny his feelings. Chaos ensues in his married life when Kim Jin, his Dissociative Identity Disorder (DID) personality, thought to have disappeared, re-appears.
