When an old man is stabbed in Paris, the visiting "Dr. Ordway" (Warner Baxter) is called upon by his policeman friend to investigate. It soon turns out that the man's son looks like he is the prime suspect. Thing is, he has a limited grasp on reality and isn't at all sure what could have happened. He just knows that he was furious with his father who disapproved of his new bride - the daughter of a cabaret performer. As "Ordway" uses his unique methods of detection, he begins to think that the killing is just the tip of an iceberg that will lead to a cunning plan to counterfeit famous and valuable works of art. This is a rather run-of-the-mill and predictable thriller that's let down by way too much dialogue and some seriously ropey French accents - all delivered by an ensemble (including Baxter) who didn't look particularly interested in the proceedings. This one also takes us into the realms of schoolboy psychology a little more clumsily than in some of the other "Crime Doctor" outings and some of the conclusions being drawn do stretch the imagination somewhat. It does try to up the ante for the genre, but there's not enough action and mystery to compensate for the drawbacks.