East London 1916. The Sanctuary Lane Animal Hospital is proving a huge success. For its founder Ruby Archer this is a dream come true - and her blossoming romance with a local boy is the icing on the cake. But in wartime things change in the blink of an eye. When a heartbreaking tragedy shatters Ruby's world suddenly she is at odds with everyone - her family her friends and even her sweetheart. And when further disaster strikes and the hospital is threatened with immediate closure she's not sure who to trust. With the festivities fast approaching Ruby desperately needs a miracle. Who can she turn to in such troubled times? And will she find out what really matters in time for Christmas Day?