When a business trip brings Frasier's ex-wife Lilith to Seattle, Frasier is shocked when she reveals that her new husband has left her -- for another man. Seeing how upset Lilith is, Frasier cannot refuse her invitation to accompany her to a benefit dinner the next evening.

Knowing he's apt to fall back into his old pattern of falling into bed with Lilith, Frasier begs Niles to join them at the charity event. When Lilith arrives in a skintight mini-dress, Frasier knows he's doing the right thing by bringing Niles along as his chaperon, and insists that Niles drive Lilith back to her hotel after the dinner to avoid any temptation.

But the next morning, Frasier decides to "surrender" to Lilith, and shows up at her hotel room. What he doesn't know is that Lilith and Niles have spent the night together! It doesn't take long for Frasier to discover Niles hiding in the bathroom, and although Frasier is hurt by their betrayal, he accepts the apologies offered by his ex-wife and his brother.