A French expatriate, Descius Heiss, leads a double life as an antique dealer and fence for stolen goods, while caring for his daughter Margaret, a talented violinist. However, his secret is discovered by his shop assistant, Archie Fellowes, who blackmails him until it all ends in a dramatic finale at a London concert hall where Margaret performs the Mendelssohn Violin Concerto.
Code of Scotland Yard
A British antiquities shop owner's dark past is revealed when his young assistant discovers his diamond smuggling operation, leading to a deadly game of blackmail and a police investigation.
