Premise: Spy for a Day is a 1940 British comedy thriller film directed by Mario Zampi and starring Douglas Wakefield, Paddy Browne and Jack Allen. During the First World War a British farmer is abducted by the Germans to take the place of a spy about to be executed whom he closely resembles.
Hypothesis: Spy for a Day is a British comedy film about a British farmer who is abducted by Germans due to his resemblance to a a spy they are about to execute and need a replacement for, and they execute him instead.