A mysterious enemy plane, the Falcon, is bombing Canada under the supervision of Axis leaders. Canadian inventor Professor Marshall Brent and his daughter Carol develop a new airplane detector, threatening the Axis's plans. The leaders kidnap Brent, but he is killed in a plane crash. Carol continues her father's work with the help of RCMP Sergeant Tom King, preventing the enemy from capturing the detector and eventually destroying it.
King of the Mounties
The deadly Falcon, a boomerang-shaped aircraft, wreaks havoc on Canada, driven by the merciless Admiral Yamata, Count.