A detective, Sung-ryeol, is haunted by guilt and secrecy after a car accident takes the life of his daughter. He's having an affair with his colleague's wife, Ji-yeon, but can't explain the truth to her. When Ji-yeon returns home shaken and bloody, Sung-ryeol's curiosity is piqued, and his world begins to unravel as he uncovers evidence linking her to a murder investigation.
Secret
A haunted detective grapples with a dark past and the weight of a long-buried secret while investigating gruesome crimes, his own emotional pain exacerbated by the devastating loss of his daughter in a tragic car accident.
