George Simenon's legendary Paris detective, Inspector Maigret is brought vividly to life by the legendary Charles Laughton. He will need all his analytical powers to track down an elusive killer. The villain, played by Franchot Tone, is a self-impressed psychopath who has been persuaded to kill the aunt of scheming Edna Wallace (Jean Wallace). Maigret must keep his patience until all the evidence is in place as he is taunted by the arrogant murderer.