Liverpool 1940. Alice King stands on the deck of SS Carlisle, waiting to escort a group of children to Canada as overseas evacuees. She is finally doing her bit for the war.
In London, as the Blitz bombs rain down and the threat of German invasion looms, Lily Nicholls anxiously counts the days for news of her son and daughter's safe arrival.
But when disaster strikes in the Atlantic, Alice and Lily - one at sea, the other on land - will quickly become one another's very best hope.
The events of one night, and the eight unimaginable days that follow, will bind the two women together in unforgettable ways.