Crooks discover a Genghis Khan treasure ship on the Canada-Alaska border but the treasure is hidden somewhere on land. In their efforts to find the hidden treasure they resort to murder and sabotage to stop the construction of the Alcan highway which will bring homesteaders to the area. Sergeant Royal of the Royal Canadian Mounted Police battles through 12 episodes to find the crooks and to learn the identity of their mysterious leader known only as 'The Boss'.

• Republic Pictures
• Jim Bannon
• Virginia Belmont
• Anthony Warde
• Dorothy Granger
• Bill Van Sickel
• Tom Steele
• Dale Van Sickel
• I. Stanford Jolley