Two Canadian Mounties and the son of Rin Tin Tin join forces to solve a complex mystery in the north woods. The trouble begins when a lumber heiress finds herself victimized by two rivals who are after her land. She seeks help from her English uncle. Unbeknownst to her, he was killed by his aide who begins impersonating him. The disguised aide then goes to Canada to take the land for himself The heiress's rivals find themselves accused of the uncle's murder. Meanwhile, an addled mountain man claims that the land is really his. It is up to the RCMP and their dog to clear the whole mess up.