In a small, rural village, a series of crime cases call for a detective from nearest town. Detective Baek, a single father of three, finds that all evidence leads to the prime suspect being none other than a seemingly meek and innocent girl by the name of Sooni. But the more he looks into Sooni’s story, the crazier it seems to drive all the adults involved in the case. Baek finds out about the existence of Sooni’s sister, Shinju. This drives the case into a deeper enigma.