Christmas 1941, Isle of Dogs. The little community on Slater Street has fought valiantly to keep their spirits up through the long nights of the Blitz. Though her husband, Alan, has been called up to serve his country, Kay Lewis is determined to give her young son Alfie and friend Vi as merry a Christmas as any other. But when a strange woman and her son arrive on her doorstep, Kay's world is shaken to the core. Could the terrible accusations that Dolly makes about Alan be true? Could he really have been leading a double life without her realising? Has he really stolen a large sum of money from Dolly and her son, Sean...