After a bank collapse leaves Benjamin January short of money, he accompanies Abishag Shaw to the annual rendezvous of the Rocky Mountain fur trade. Shaw is searching for the person responsible for his brother’s death, while January enters a temporary settlement crowded with trappers, traders, Indigenous visitors and opportunists.
The discovery of a corpse turns private vengeance into a wider investigation. Amid gambling, alcohol, commercial rivalry and the isolation of the frontier, January uncovers evidence of a scheme involving madness and repeated murder, while the absence of reliable law leaves him dependent on his own judgement and uncertain allies.