Lulu's intolerable. From the outset she wormed her way into the affections of her stepmother and, with spite as her principal hobby, spent every childhood moment trying to undermine poor Geraldine, her dumpy and hardworking stepsister. Now she's an adult: sexy, long-legged - and ruthless. Jobs, lovers, fashionable clothes: Lulu picks any and all at whim and drops them with equal ease, all the while confident that Geraldine and her faithfully supportive husband, Robert, will bail her out of every passing problem. But not even watchful Robert has realised quite how much Geraldine's exemplary patience has rested on one simple but long-lasting assumption about her own family. Could everything be about to change...?