The Canadians have discovered a valuable substance called Compound X, which can cure infantile paralysis. When a country at war with Canada learns that Compound X also contains magnetic properties that could aid them in their warfare against the British, they send agents to infiltrate Canada and steal a large quantity of the substance. It's up to Sgt. King (Allan Lane) and his Mounties to track down the agents and put an end to their scheme.
Allan Lane
as Dave King
Robert Strange
as John Kettler
Robert Kellard
as Tom Merritt, Jr.
Lita Conway
as Linda Merritt
Herbert Rawlinson
as Ross King
Harry Cording
as Wade Garson
Bryant Washburn
as Matt Crandall
Budd Buster
as Vinegar Smith
Stanley Andrews
as Tom Merritt Sr.
John Davidson
as Shelton
John Dilson
as Wall
Paul McVey
as Zarnoff
