Tom Morgan flees from a Huron attack on Morgansboro, thinking his father, Will, is dead. But Will is rescued by Hawkeye and Chingachgook-and labels Tom as a coward.
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.