After almost four dozen films, this was the final installment in the Charlie Chan series from Twentieth Century Fox and Monogram Pictures. Like the final six, this one starred Roland Winters as the detective...and his version of Chan was far weaker than the one played by Warner Oland as well as Sidney Toler.
The story begins on an airliner. Chan and #1 son, Lee (Keye Luke), are aboard and things seem pretty normal. After all, Charlie had just finished a case and they're heading home. However, something evil is afoot....and Lee realizes it when he awakens to find everyone either asleep or dead! One of the pilots was stabbed and someone obviously knocked everyone else out by lacing the drinks with something....and a fortune in money being transported in the plane is gone!
Like all the later Charlie Chan films, this one is weak...but still watchable. Roland Winters simply isn't as fun as Sidney Toler and the solution to all this was telegraphed. When baddies all 'accidentally' get shot and killed by the same person, it doesn't take Charlie Chan to figure out they are evil! Fair...at best.