An ornithologist mistaken for an explosives expert is sent alone into a small French town during WWI to investigate a garbled report from the resistance about a bomb which the departing Germans have set to blow up a weapons cache.
It's the kind of comic allegory about war that depends on muddleheadedness in order to make much sense, but if you're feeling muddleheaded, you might find yourself charmed and enchanted by the conceit.