Lita Conway

Someone wants to kill Magpie Harper. Crash and Dusty arrive too late, Magpie Harper is allready dead.

Lorsque l'homme de main de Moreland attaque Bob Horner, les Range Busters le brisent. Horner meurt mais ils ont le bébé que Moreland recherchait. Il doit l'avoir pour devenir son gardien et prendre le contrôle du ranch Horner. Lorsque les hommes de main rattrapent Alibi, ils prennent le berceau pour bébé sans se rendre compte qu'Alibi a remplacé son mannequin Elmer. Crash ayant des preuves Moreland est celui qu'ils veulent, a maintenant un plan pour l'exposer.

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.