When the hitting coach of the local minor league baseball team suddenly dies with amphetamines in his system, the team's manager believes it to be foul play, so he hires Shawn and Gus to go undercover as the new coach and mascot in order to investigate.

As Juliet's birthday approaches, Shawn takes it upon himself – due to his own daddy issues – to reunite her with her estranged father Frank O'Hara, without taking the time to learn that he's a con-man. Not wanting Juliet to be resentful, Shawn hires Frank to assist them in a case involving a safe cracker who was broken out of jail.