Hawkeye and Chingachgook come to the aid of a young Indian doctor who attempts to practice in an intolerant town.

Sent to investigate a complaint that Ethan Allen and his Green Mountain Boys are committing crime verging on treason, Hawkeye and Chingachgook discover that the local sheriff and tax collector are victimising local settlers.

Weird incidents terrorize a frontier town. in spite of Hawkeye's efforts to disprove the witch stories, strange murders increase the settlers' horror.

Hawkeye and Chingachgook are given authority to investigate the claims that servants are being sold into bondage.

They learn that an unscrupulous farmer is behind the illegal transactions.

Angry settlers blame gunsmith Eben Cotton and his daughter Beth for illegally selling rifles to the Ojibwas.