Michelle must decide which friend to take with her to a secret gig. Mike discovers a new religion and has a bizarre moment of epiphany. Claire and Grant fall out over a Scrabble game. Dean tries to persuade Michelle to have break-up sex.

When Michelle's new flatmate Chris calls her immature, she tries to show him just how grown up she is by marrying Grant. Claire falls for Chris, but he seems more interested in books than in her, so she resolves to seduce him, come what may.

When Grant dates Michelle's gorgeous friend Chloe, Michelle gets jealous and resorts to underhand tactics to split them up. Claire resolves not to sleep with anyone outside marriage just as Chris realises that the only woman he wants to sleep with is Claire.