Nazi spies in the guise of servants have managed to infiltrate the household of inventor Stephen Lawry (Reginald Denny). Lawry is working on a secret formula for the U.S. government. Fortunately, his wife (Ann Harding) has called in the famous private detective, Captain Duncan Maclain (Edward Arnold), to handle a murder case which indirectly involves her step-daughter (Donna Reed). The detective moves in as a house guest. The Nazis are not unduly alarmed. Duncan Maclain is blind.
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The review of this Movie prepared by John Reid
