A fatal car crash with only one witness-but is she telling the truth?

On a winding cliff edge on the wild Irish coast, two cars collide. In one is Maura Claffey's niece, Finn, and her baby daughter. In the other, Kathryn with her own newborn-and her own secrets. Both women survive, but one of the girls does not.

In the aftermath, bruised and heavily medicated, both women struggle to come to terms with what happened that day. Recovering at Maura's home, Finn's confused thoughts continually return to her recently deceased mother, who left Ireland under mysterious circumstances, but Maura won't be drawn into revealing anything. Meanwhile Kathryn, certain that she's being lied to about the crash, goes in dogged pursuit of the truth.

Only Maura has the answer. Only she was watching that day. But she won't let anyone get in the way of what she wants...