Smoke Jensen and his adopted son Matt are cooling their heels in Colorado when they are called to the Dakotas. Preacher, the legendary mountain man, is in the midst of a vicious struggle. Someone has kidnapped a proud Indian chief's daughter and grandchild. When the kidnapping turns to murder, and Preacher vanishes after clashing with a ruthless Union colonel turned railroad king, Matt sets out to infiltrate the Colonel's gang of killers; Smoke seeks out the only honest citizens in the crooked town of Hammerhead...