Plymouth, 1941. As sirens blare all around, the Shawbrook family take refuge in a packed shelter. Bombs have already begun to fall through the night sky when they realise their infant son, Freddie, has been forgotten in the rush, left to sleep in his crib. Terrified, Vera, his young mother races to find him and bring him to safety.
The next morning, police officer David Shawbrook returns from his watch to find the shelter pulverised, and his family seemingly all dead. Dirty footprints inside their home betray the looters who have rifled through the house.