Robin and Sarah weren't the closest of twins. They weren't even that similar. But they loved each other dearly. Until, in the cruellest of domestic twists, they were taken from one another. Now, in her early 30s, Robin lives alone. Agoraphobic and suffering from panic attacks, she spends her days pacing the rooms of her house. And Sarah has just been accused of the most terrible thing of all ... Two sisters. A lifetime of secrets. One terrible reckoning.