Dave's mother Chel is overwhelmed by a surprise birthday party thrown in her honour by the Rafters. At the end of the party Rachel discovers marks on Chel's arm which Chel brushes off but which Rachel feels are drug marks. Later, Chel confesses that she is HIV Positive and has been for over 20 years. Ben and Mel come down with food poisoning after eating smoked oysters at the birthday party but afterwards Mel finally accepts Ben's marriage proposal. Jake and Rachel continue to remain strained but he encourages her to talk to his mother who has apparently changed since's Rachel's tirade. Artemis decides to go travelling with Lexi after too much interference from both Carbo & her parents.