Detective Jung Seohun's got a new partner- a strapping young academy graduate and detective on a fast-track to promotion, Detective Jang Haejoon. While Haejoon proves to be an observant, capable partner, he rubs Seohun the wrong way with his somewhat defiant, intrusive attitude. As they embark on a murder case together, will the two detectives get along? Will their partnership prove to be something more than... a police partnership?