A doctor suspects his patient and his patient’s son are involved in an unsolved serial murder case.
Seung-Hoon (Cho Jin-Woong) is a physician. He opened a clinic in Gangnam, Seoul, but the clinic went bankrupt. He then lands a job at a hospital run by his friend in a satellite city of Seoul. Seung-Hoon then becomes involved in a series of murder cases. The murder cases are connected when a woman’s severed body comes out from the melting Han River.