Ex-con Karen needs Diane's help to track down her fourteen-year-old daughter, Sunny, who she's lost contact with while she's been in prison. To Diane, this appears at first glance to be a simple case of a mother wanting to reunite with a beloved daughter. But she soon learns that while Sunny miraculously survived her mother's attempt to kill her, little brother Oliver was not so lucky. Tracking the girl down is easy. However, convincing her to meet the woman who tried to kill her is no easy task. And at the back of Diane's mind is a nagging thought - that guilt and innocence aren't straightforward and nothing is quite what it seems. Does Karen really want to fix the wrongs of the past or is there something darker at play here that will take all of Diane's skills to uncover?