A medical mystery drama about a psychopath genius neurosurgeon. Kye Jin Sung (Park So Dam) is a detective in the violent crimes division. Meanwhile, Lee Young Oh (Jang Hyuk) is a male neurosurgeon who becomes a new assistant professor at the hospital. The drama promises to shed the usual medical procedural framework and will tell a mysterious story about “someone who kills, someone who saves, someone who chases, and someone who’s chased.”