1914. Mining engineer Tommy Birch goes off to war, leaving his new wife Rita behind in Pontefract. On the front line, Tommy runs afoul of a German mine and is reported as missing, presumed deceased by his fellow soldiers. But Tommy isn't dead.

Found behind enemy lines, wearing only a pair of boots stolen from a dead German, Tommy is picked up by the enemy who believe him to be one of their own. He spends weeks recuperating in a German military hospital, where he meets, and quickly falls in love with, a nurse named Anna Kohler who tends him back to health.

Meanwhile, back in...