1925. The war is over and a new generation is coming of age, keen to put the trauma of the previous one behind them. Selina Lennox is a Bright Young Thing whose life is dedicated to the pursuit of pleasure; Lawrence Weston is a struggling artist, desperate to escape the poverty of his upbringing and make something of himself. When their worlds collide one summer night, neither can resist the thrill of the forbidden, the lure of a love affair that they know cannot possibly last.