It's 1969, and while the summer of love lingers in London, Gilda is consumed by the mistakes of her past. She walked out on her beloved son Reuben when he was just a boy and fears he will never forgive her. When Reuben marries Alice, he seems transformed by love - a love Gilda has craved his entire adult life. What does his new wife have that she doesn't? And how far will she go to find out? It's an obsession that will bring shocking truths about the past to light . . .