While working surveillance on a routine cheating spouse case, Sam and Eddie hear gunshots and race in to catch a Hollywood producer standing over the body of his mistress, clutching a smoking gun. It's case-closed as far as Eddie or any cop is concerned. But when the producer insists he's innocent, Sam agrees to take on his case, much to Eddie's chagrin. When their initial inquiries uncover that the producer's mistress isn't who she claimed to be, the pair are thrust into an investigation where not everything is as it seems.
Sam Swift is the former star of a hit cop series who's fresh-out-of-rehab following a bender of epic proportion. Desperate to restart her career, she talks her way into shadowing rough-and-tumble private investigator Eddie as research for a potential comeback role.
Though lonewolf Eddie resents the babysitting gig, high-spirited Sam proves herself to be surprisingly valuable, drawing on her acting skills and 200 episodes of playing a detective. When the press touts Sam's role in solving a high-profile case, Eddie finds his phone ringing off the hook with new clients looking to hire the pair.