Four teens in the suburban New Jersey town of Roscoe start attending Henry Roscoe High School. Fed up with their school's radio station (Cougar Radio) dictating how students should live, and the overbearing Principal Waller who seems to favour the popular students, they create their own pirate radio station called Radio Free Roscoe. Lily Randall, Ray Brennan and Robbie McGrath are old friends, and find a friend in Travis Strong when they form the radio station. They assume radio aliases to conceal their identities.

The four friends confront various challenges, such as navigating relationships with their schoolmates and managing their pirate radio station while maintaining their day-to-day lives.