Jung Ba-Reum is a rookie police officer. He is an honest person and tries to attain justice. After Ba-Reum faces a psychopath murderer, who places the entire nation in fear, his life is totally changed.

Jung Ba Reum (Lee Seung-gi) is a rookie police officer, working at a police substation whose life changes when he encounters a psychopathic serial killer. This drives him and his partner Go Moo Chi (Lee Hee-joon) to unearth the truth behind psychopathic behaviors. This also raises the questions, whether it is possible to scan a psychopath in the mother's womb using fetal genetic testing? And if the child in the womb is a psychopath, will it be wise to have that childuu—T