Sgt. Renfrew and Constable Kelly go aloft to search for a plane missing with a shipment of gold from the Yukon Mine Company. Inventor Speavy has devised a power ray which disrupts electrical impulses, and Morgan and his gang of crooks has brought in Prof. Lewis to increase the ray's range, telling him he's helping the government develop this new weapon. Speavy spills the beans to Prof. Lewis and his daughter Madeleine,and Morgan threatens to implicate them in his crimes unless they cooperate. Morgan kills Speavy when he tries to warn Renfrew, but when Madeleine stows away on board the doomed plane Renfrew is piloting, will the crooks be able to make Prof. Lewis use the power ray to bring the plane down?
as RCMP Sgt. Renfrew
as Madeleine Lewis
as Uncle Dinwiddie
as Morgan
as Professor Burton Lewis
as Inspector Warner
as Constable Kelly
as Hawthorne
as Henchman Gary
as Speavy
as Whispering Smith
as Henchman Hutchins
as Henchman Brownie
as Pilot Buzz Murphy
as Radio Operator
as Henchman Butch
as Mechanic Greaseball
as Pa, Man in Nightshirt
as Ma
