Annie and Ethan get paired up for a class project where they must take care of a baby. This time together forces them to see each other in a new light. At Silver's half-birthday party, Silver and Dixon continue to get closer. Meanwhile, Harry and Debbie must deal with Harry's past when Tracy tells Harry that she's hired an investigator to find their son. Elsewhere, Ryan tries to cope with Kelly leaving and decides to try online dating.

Brenda and Kelly's friendship takes a turn for the worse. Meanwhile, Sean moves in with the Wilson family, Naomi hangs with a new crowd, and Silver becomes jealous when a cheerleader pays a little too much attention to Dixon

Liam displays his dark side to Naomi, who is stunned but captivated by the intense, handsome bad-boy. Meanwhile, Annie and Ethan face another bump in their relationship when Adrianna makes it known that Ethan and Rhonda shared a kiss, and Silver and Dixon make a video that stirs quite a controversy at West Beverly Hills High.