Zack Logan came down river on a raft loaded with a catch of sable pelts that spelled a fortune in St. Louis - but he had to get past Fort Deception where Fitzhugh Fur Company roosted. Zack knew how Fitzhugh Fur worked. He'd come up against them once when they killed his brother and he barely got away with his own life. He tried to get past at night, but they caught him, robbed him, and set him adrift. Then he met up with the girl . . .