Plot synopsis: A serial killer is burning away the flesh of his victims with acid, leaving only the bones behind. The police turn to Hyun-min, a former forensic sculptor adept in reconstructing faces by examining and interpreting skulls. With the victim's bones in his house, Hyun-min's daughter begins to experience disturbing visions. As he races against time to find the answers and save his daughter, the deadly truth behind these victims reveals a sinister conspiracy that threatens everyone involved.