A doctor asks Valerie to be screened to be a bone-marrow donor for an ailing leukemia patient. Valerie is delighted with the idea, but she soon reneges with she finds out that the patient sexually abused his teenage daughter. Meanwhile, Donna becomes jealous and suspicious when an old girlfriend of Noah's, Gwyneth, shows up for a visit. David lets his paranoia go too far when he gets mugged. He tries to buy a gun, and eventually steals Noah's gun, accidentally wounding Gwyneth. Kelly continues to be suspicious of Brandon until he offers her an engagement ring. Also, Steve, Brandon and Janet screen applicants for a new assistant for their newspaper. When a young college grad student, Sarah, responds to the call, Steve is wary of hiring her, anxious that he will fall in love with her.

With a few hours before Brandon and Kelly's wedding, they continue to feel uncertain about the path they are on. Jim and Cindy Walsh arrive in town from Hong Kong to help plan Brandon and Kelly's wedding. Meanwhile, Valerie finally decides to get an AIDS test after Johnny confesses to her that he happens to be HIV-positive, and she asks David to come along with her for emotional support. Steve becomes dateless for the wedding when Sarah decides to go back to her husband after witnessing her friend's messy break up. After the caterer, Jacob, saves Donna's life, Donna agrees to go on a pretend date with him to make his ex-girlfriend jealous. This makes Noah jealous.