After escaping a train bound for a death camp with a trusty German Shepherd dog, a girl wakes to find that she has no memory of her former life.

Lily is fostered by the kind RAF pilot who found her and his wife, Meg. It is not long before their lives are disrupted once again by the war and, with their home in ruins, they are forced to flee to the country.

In the Somerset countryside, Lily is reunited with Rudy, the heroic German Shepherd. However it soon becomes clear that Rudy is not just her companion, he is protecting her too, and someone wants him out of the way...