Stolen secret papers contain info on the mysterious 95th element, which could be used to build a giant atom bomb. Charlie Chan signs on to recover said papers—and also to track down the murderer who shot the secretary before snatching those vital documents.
Unfortunately, most of the picture is not as exciting as that sounds....however, this late entry in the Chan series is passably entertaining as well as short and sweet.
A mystery mechanism is used to commit multiple murders—one shot is always heard but two bullets are found. Can Chan solve the riddle before he too becomes a target?
Benson Fong is on hand again as Chan's #3 son Tommy, while Willie Best takes on chauffeur duties for this picture (as Chattanooga Brown, cousin to Mantan Moreland's Birmingham Brown). Tommy and Chattanooga manage most of the comic relief with mildly humorous exchanges such as:
Chattanooga: "My hair's getting tired." Tommy Chan: ""Your hair is tired?" Chattanooga: "Yeah, for the last 10 minutes it's been standing on end."
The fact that Sidney Toler dancing the rhumba is probably the highlight of the picture might tell you something.