1966. Four seventeen and eighteen year-olds from South London - Carol-Anne, Jeanette, Terry, and Mark - head to Brighton, intent on a weekend of seaside fun. Dancing, drinking, and sex are high on the agenda, and not necessarily in that order. It's the Swinging Sixties, and the world is changing fast. An exciting time, but a confusing one, too. Freedom is all very well, but brings with it endless worries and complications. Each of the teenagers has a secret; nobody is quite what they seem. Especially Jeanette. When she disappears on a night out, tensions begin to rise as the others struggle to work out what to do. They agree on two points: no parents, and no police. But can they really handle the situation on their own? In the midst of the chaos, one thing is certain: after the weekend, nothing will ever be the same again.