Fliss is forced to stay at Matthew's house while her mother is on her honeymoon, causing the boys to instigate a turf war. Rosie and Kenny also start to take more of an interest in boys. The girls throw a party for them once they get back.
The Sleepover Club play matchmaker and Rosie Cartwright, the new girl at Crescent Bay, proves to be worthy of the sleepover girls friendship when she gives the M&M's, the Sleepover Club's arch rivals, the perfect payback.
Rosie comes up with a brilliant theme for a sleepover - a Hawaiian beach party. She doesn't want to host the sleepover however, her first, and suggests they have it at the beach.
When Mr Stephanopolous, the owner of the girls favorite hangout The Beach Hut Cafe, decides it's time to retire early, Frankie sets out to show him how important he is to the whole community-but, as usual, the M&M's mess everything up.
Frankie still needs convincing that Rosie really is Sleepover Club material and decides Lyndz's birthday "scary movie" sleepover is the best time to make sure.