Adrianna must cope with her decision about her baby and her baby's father and turns to Naomi and Kelly for support. Ethan helps Annie prepare for the school play's try-out and are shocked to find out that Ty is also auditioning. Meanwhile, Dixon asks Debbie for relationship advice.

Adrianna tells the baby's father and her mother that she is pregnant. Meanwhile, Annie feels threatened by Ethan's friendship with Rhonda; and Silver finally opens up 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.

Following their engagement, Navid and Adrianna celebrate their respective bachelor and bachelorette parties. While Adrianna feasts with friends and family at the Wilson home, Navid and the boys spend a wild night with college girls at a burlesque club. Meanwhile, sparks fly between Ryan and Jen, and Dixon continues to feel unappreciated by Silver.