It's Tracy's birthday, but unfortunately for her, it's also younger boy Peter's birthday. He's extremely excited, but Tracy is doing her best to appear cynical and detached. Justine laughs at Tracy's hopes to get something from her mum, but the smile is wiped off her face when a card arrives in the post for Tracy. Mike notices that the card from Tracy's mum is written in brown felt pen and realises that Peter left the card. However, it fooled Justine and Louise, and Tracy says it is the nicest thing anyone has ever done for her. The party still goes wrong when Duke accidentally destroys Tracy's birthday cake and the sound system goes wrong. Tracy sulks in her room. Adele lures her downstairs and reveals that Ben has provided a new sound system. Tracy and Ben make friends again.

Tracy is excitedly waiting to be taken out for the day. However, when Tracy sees who's going to be taking her out – Terry and Jill Brown – she's horrified to see they are old. On the other hand, Peter likes the look of them. The day out doesn't go well, as Tracy is too lively for Terry and Jill to cope with. But a vengeful Tracy persuades Peter to become bad so that the Browns will not foster him, bringing chaos to the DG and completely shattering her friendship with Peter.

It's Peter's last day at the Dumping Ground before he goes to live with Terry and Jill. Everyone attends his party, except Tracy, who is secretly looking after two giant African land snails for the weekend. Later that night, it's full moon, and Zac has hung up garlic all over his and Ryan's bedroom so as to scare off vampires. And the snails escape from their cage. So, soon enough, everyone is creeping about all over the DG.