Theresa Joanne (TJ to her best mates) is having a difficult year. First her best friend moves away when classmate Wendy appears to have it in for her. TJ's never felt more alone. Plus there's a problem with boys. They treat her like a mate and never seem to notice that she's a girl.

When Lucy befriends TJ things start to look up. But will Nesta and Izzie also accept her? Will they let her into the world of sleepovers, secrets, laughter and advice? Can they help TJ be herself and discover her real potential?