Jeon Jun-oh (Hwang Jeongmin) is a former bank employee who now makes his living as an insurance investigator. Summoned to the country estate of potential client Park Chung-bae (Gang Shinil), Jeon is unnerved by his host's jittery behavior, and shocked to find the body of Park's seven year old son hanging lifeless from the ceiling. Everything in this house has a grim aura, including Park's wife Shin Yi-hwa (Yu Seon) - a grieving cripple who recently failed a suicide attempt. Jeon slowly becomes convinced that Park is in fact a psychopath attempting to carry out an elaborate insurance scam. When Jeon's attempt to convince the authorities of Park's guilt seem to fall of deaf ears, the sleuthing insurance investigator becomes obsessed with the prospect of uncovering the truth about this strange case. Unfortunately for Jeon and his unsuspecting wife Mi-na (Kim Seohyeong), this mystery is much deadlier - and deeper - than anyone ever imagined imagined.
