 One long, hot summer in seventies London, Holly and Marina make a childhood pact to be friends forever. For the troubled, unpredictable Marina, with her seemingly glamorous father and her Valium-addicted mother, Holly stays the only constant in a life of divorcing parents, experimental drugs and fashionable self-destruction. Meanwhile, Holly buries herself in books out of feelings of frustration with her over-protective mother and a nagging insecurity around her beautiful and possessive best friend. She holds just one secret from Marina, her increasing passion for Marina s brother Nat. As the years roll by, the girls experience everything life has to offer, sex, love, loss and rock  n roll. But eventually for Holly, a friendship which has never been equal gradually begins to feel like a trap.