Michelle and Grant take action to remove Grant's bullying boss, but their plan backfires when Michelle takes some drugs, and Grant dumps her. When Chris gets the clap, the disease badly affects his hair, and Claire dumps him. The dumpees, Michelle and Chris, take comfort in each other's arms.

When Michelle tries to get her old job back at Glo gym her boss Rachel relegates her to the position of towel girl, so Michelle resorts to a novel interview technique to get a job as Grant's PA. Chris takes Claire to meet his parents and discovers that they share a revolting secret.

When Grant's new lover Rachel demands that he stop seeing Michelle, Michelle enlists the help of a blow-up sex doll to persuade Grant to confront her and gets fired. Chris discovers that being engaged makes him a love god, but when he refuses to buy Claire a ring she finds herself slipping back into her slutty old ways.

Gorgeous barman Alex rejects Michelle because she's vain, so Michelle determines to win him back by becoming the ugliest woman in Manchester. To overcome his obsession with Michelle, Grant vows to go home to Swansea, but he is hijacked on his way to the station by Michelle's deranged boss, Rachel. Chris prepares to take out his sexual frustrations on a watermelon.

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.

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.