Join the Sleepover club: Frankie, Kenny, Felicity, Rosie and Lyndsey, five girls who just want to have fun – but who always end up in mischief. It's time for the annual twenty-four hour sleepover but the girls soon discover that their arch-rivals the M&Ms are planning to sabotage their fun. Of course, the Sleepover club rise to the challenge but they soon find that revenge can be sickly sweet ...