Fed up with the singles scene, Nan decides to enroll in an online dating service and let Mr. Right come to her. But all her vital statistics seem to pull in are men named Lou -- short for Loser. Meanwhile, her "regular, blah, ordinary" sister, Bert, seems to attract nothing but Mr. Rights, including Nan's ex-boyfriend. Curious as to what Bert has that she doesn't (aren't they identical, after all?), Nan decides to pass herself off as Bert online. Almost immediately she hits a bulls-eye: gorgeous graphic designer Derek Stanhope. But when Stanhope is found murdered, Nan is in serious double jeopardy -- from her furious twin, and as the police's prime suspect!