Sungdongil Stories

The kdrama actors are sent to to High School for Education promotion. Kim Rowoon has a crush on a fan of his after she tells him a secret only he knows. However she is also heard confessing her crush on Seo In guk in class. This causes Rowoon to pine which forces his roomates to take action so he can propose.

In order to tackle high profile cases in Seoul, a police unit consisting of the most talented and skillful detectives is created called Unit S. The story follows as the detectives in the department solve highly publicized cases while dealing with pressures from both the public and the police force as well.