In the 1960s, friends Sandy, Boo, Scollop, and Robbie head to a beach north of Sydney with the idea to throw a bachelor party of sorts for Sandy, celebrating his imminent wedding. When Sandy rejects Boo's suggestions for the weekend's debauchery, tension rises to a boiling point. At a local dance night event, Boo gets close to a teenaged girl, named Caroline, whose father owns a caravan park. Caroline's dad learns about what transpired between the two and searches for Boo with a loaded gun.