Baywatch lifeguard Mitch Bucannon and L.A. policeman Sgt. Garner Ellerbee begin moonlighting as private investigators for a small detective agency owned by Ryan McBride, which is located above a nightclub called "Nights" owned by Lou Raymond. Mitch and Garner's first job comes when they are hired as bodyguards for Cassidy, a fashion model, who claims that she is being stalked by a madman.

A strange woman asks Mitch and Garner to find her daughter, who is the only witness to a murder.