Yukon Flight plot
"RENFREW AND HIS RED RAIDERS ROAR ACROSS THE SKIES!"
When a Yukon and Columbia Mail Service plane crashes, RCMP Sergeant Renfrew and Corporal Kelly suspect an assassination attempt. Their suspicion is confirmed when Renfrew finds a blocked joystick, which must have left the plane uncontrollable. Meanwhile, the mine owner Louise Howard reports the disappearance of her employer. Renfrew and Kelly find his murdered body and the cause of death here also seems to be an accident. Renfrew discovers that Raymond, who has worked for Louise, is the real owner of the Yukon and Columbia Mail Service and that Yuke Gradeau is in charge of its day-to-day running. When the gold from the mine is not delivered to Louise, Renfrew suspects that Raymond and Gradeau know more about it.