Jackie is on a caravan holiday with her mother. She lives a lonely life without friends or even someone to talk to, and the holiday has so far only reinforced her sense of isolation. Jackie longs for a place where she belongs. There, she can find something different, someone to talk to, someone to dance with.

Twelve is set during a day at a public swimming pool. Tilde announces to Alva that she has just had her first period. This sets off a mounting sense of insecurity in Alva, which only increases when she notices her crush paying Tilde more attention.