Mark is going through a bad divorce. He's had to move out of his house and into an apartment. One night, while feeling particularly lonely, Mark is surprised when his neighbor, Laura, comes by to drop him off a "welcome to the neighborhood" dinner. He invites her in and they end up spending the most amazing night together. The only problem - Mark has no condoms. So, Laura suggests that a little anal sex is in order.
After that night, Mark and Laura remain friends, but never sleep together again. However, months later, Mark is surprised yet again when another beautiful young woman knocks on his door, Cassie, Laura's virginal college-bound daughter. Cassie claims to be running into Mark's apartment to get out of a storm, but Cassie has heard from her mother what a wonderful lover Mark is and wants in on the action too - and she wants to do EVERYTHING her mother did.