Aged thirteen, Jane makes a vow to herself and to her feuding parents - she will never marry, have children and lead the resentful life they chose.
Years later, now a Harvard professor and living with Theo, a filmmaker, Jane falls unexpectedly pregnant. She begins to warm to the idea of motherhood, but a devastating turn of events takes the decision out of her hands in a way she could never have predicted.
Her familiar world torn apart, Jane feels forced to leave her old life behind, and piece by piece begins to destroy the little that is left. She resigns from her job, cuts all ties with friends and family and moves to a place where no one will find her. Isolated, she feels she has finally succeeded in leaving her world.
Yet when a young girl disappears, prompting a high-profile police investigation, Jane is drawn in. Convinced that the person at the heart of the case is much closer to her new community than anyone realises, she has to make a decision - stay hidden or bring to light a shocking truth.