Billy and Billie both arrive at the family home for Thanksgiving, despite Billie barely being able to contain her rage at her step-father; a family football game on the lawn leads to a drunken confrontation and an exposure of a secret.

Billie bounces back by beginning a dalliance with a TV star and continues to enjoy success at work, but her world is soon turned upside down once again.

Billie spends a long day getting advice about life and love; Billy is asked to take time off from work and he takes refuge with a sexy waitress from a local diner.

After their mother has a barely controlled freak out about their relationship, Billy and Billie both have a strange day that tests their loyalty to each other.

Billy and Billie work contentedly together at Chisel; while Billie is out getting lunch, she runs into her father having a "business lunch" but his actions make Billie suspicious.

Billy becomes increasingly committed to his relationship with Billie and makes a public declaration of his "like" for her; Billie joins Billy at "Chisel" for an interview to become an illustrator for the company.

Billy and Billie try to keep their romantic relationship under wraps while visiting their parents' house over Halloween; a late night encounter with their half-brother, however, puts their private union in jeopardy.

Billy and Billie's chance run-in at a restaurant complicates their personal and professional relationships.

After a close call where family members walk in on them sleeping, Billy and Billie decide to put their relationship on hold; Billy bounces back quickly but Billie has a harder time of it.

Stepsiblings, Billy and Billie, reunite after many years apart and sleep together. The next morning they face the inevitable question: can they actually have a real relationship together?