Inspector Archibald Constant Cumberland of the Northwest Mounted Police establishes Fort McGregor at the confluence of two rivers in the heart of the Canadian Northwest Territories. His mission is simple: keep peace with the Blackfoot Nation and fend off whiskey traders.
But life at Fort McGregor is rarely simple. An Indian agent conspires with whiskey traders to upset the delicate peace Cumberland has established, while is own men are not to be trusted. When they begin talking about seeing a ghost from the ramparts of the fort, he refuses to believe them.
But he will have his own encounter with the impossible creature and it will change everything. Soon he finds himself fighting for control of the fort and his life against incredible forces.