Lucy Wakefield is a seemingly ordinary woman who does something extraordinary in a desperate moment: she takes a baby girl from a shopping cart and raises her as her own. It’s a secret she manages to keep for over two decades—from her daughter, the babysitter who helped raise her, family, coworkers, and friends.

When Lucy’s now-grown daughter Mia discovers the devastating truth of her origins, she is overwhelmed by confusion and anger and determines not to speak again to the mother who raised her. She reaches out to her birth mother for a tearful reunion, and Lucy is forced to flee to China to avoid prosecution. What follows is a ripple effect that alters the lives of many and challenges our understanding of the very meaning of motherhood.