T.C. and Magnum train their respective junior basketball teams for an upcoming game. T.C.'s team seems to have the advantage until Magnum meets a spunky young teenager with a great game and persuades her to join his team. Magnum and Higgins take a shine to the girl, but discover that her foster parents are criminals who are using her as a pawn in running their con games.

To smoke out the thief in a large family-owned business, Magnum feigns marriage to the CEO's niece, who drives a mean limousine and can't quite make up her mind how she feels about men, marriage, and Magnum.