After having a conversation with Roz about being ripped off by con-men, Frasier thinks he can tell when someone's a con and when they're not. Later, his dad tells him that it's a lot harder to tell than he thinks, and that he's having three friends coming over for poker, and one's an ex-con. He bets Frasier 20 bucks that he can't guess which one's the ex-con. Like Martin predicted, Frasier got it wrong. He was surprised to find out who the con was, and so was Daphne, as she had made a date with him. Stunned by the news, both Niles and Frasier hurry off to protect Daphne, before something bad happens.