Roz gets involved with a man who owns and lives in a boat, and after meeting Frasier the two become fast friends.
However when Roz breaks up with him for cheating on her, Frasier is hesitant to break off the friendship, so after convincing each other that there was nothing wrong with them being friends, as long as Roz doesn't know, they continue to hang out.
Frasier then begins feeling guilty, feeling as though he betrayed Roz, but what he doesn't know is that Roz took him back, and all the confusion makes Frasier and Roz change their dinner plans constantly.
When Frasier goes to see Luke, to tell him they need to end the friendship, he gets caught in a closet with Roz, when Luke brings home another woman, at which time Frasier, and Roz, fall out of the closet.
I loved this episode, especially when Roz and Frasier kept seeing Luke behind each others back, and then finding out that he lied to them both.