Dongbang Yu-Bin (Kim Dong-Wook) is a smart, attractive, and athletic man. He works as a professor at a prestigious university outside of South Korea. He gets offered a lifetime faculty position there, but he turns the offer down. Instead, he returns to South Korea and volunteers as the chief of the Violent Crimes Unit 2 at Songwon Police Station. The Violent Crimes Unit 2 team ranked at the bottom in the nation's arrest performance. Dongbang Yu-Bin meets the members of the Violent Crimes Unit 2, who all have various personalities. His goal is to turn the team into one of the best detective team.