Teenagers Debbie and Sue are having the time of their lives, hanging out on Cronulla Beach and fantasising about getting into the Greenhills gang, the bronzed surfers and their chicks who rule the beach. But Debbie and Sue are blissfully unaware of the sexual and social mores of the group they long to join, and just as unaware of the tangled sexual and emotional lives their parents lead.

Debbie and Sue go to great lengths to get the attention of the Greenhills gang, including getting caught cheating at school. But when Debbie catches the eye of Bruce Board, ace surfer and super spunk, she's in. While she revels in her new found status on the beach, Sue is mortified to come home and discover her parents playing Strip Jack Naked. And while Debbie is getting a lot of notice at school, her father Martin has noticed the attractive newcomer at work.

Cheryl sets out the rigid Greenhills rules for Debbie and Sue: root their boyfriends too soon and they're molls, wait too long and they'll get dropped. But she doesn't waste much time before she breaks those rules herself, getting drunk on Brandivino. And while Debbie has difficulty losing her virginity, Sue - who now has a surfie spunk of her own - has no such trouble, although the experience is less than stellar.

An impromptu party at Cheryl's house leads to disaster for Debbie, when Bruce suddenly drops her. But she's not the only one: ace surfer Gary gets dropped too. Meanwhile, Gary's dad Ferris is wining and dining his young lover and inviting friend Roger to join him. But it's Debbie's mum Judy who smells a rat... or in this case, something fishy about a missing lobster that her husband Martin fails to bring home.

After a fight with her mum, Cheryl decamps to Debbie's house for a while and proves an unwelcome guest to everyone, except David. He's falling in love. Gary and Debbie are growing closer, too, but his father Ferris is distraught when his affair folds. Debbie is unaware of the growing strain in her parents' relationship, but Gary is acutely aware of his. Meanwhile, the girls are getting bored waiting on the beach, watching the boys surf.