Dan Seymour has set up a syndicate to fence a stolen emerald. He plans to cheat them all -- investors and girlfriend and fly off to South America. Alan Curtis as Philo Vance takes an interest; Seymour told theres of the syndicate he had hired Curtis to guard the emerald. Curtis meets him in Seymour's study. While they speak, the lights go out, two shots are fired and Seymour is dead.
As with the other two PRC Philo Vances, it's a well-constructed mystery if not exquisitely produced. Curtis still doesn't look or act anything like the Philo Vance of S.S. Van Dyne's books. He's a middle-class PI who knows all sorts of interesting people. Basil Wrangell directs for speed and efficiency, and the number of interesting performers is kept to a mimmum : Grady Sutton as a secretary, Joseph Crehan as the District Attorney, and Tala Birell as a suspect. At an hour's length, it does what a mystery movie is supposed to do, but no more.