Crazy Bob McGill, spying on Sheriff Dan Vickers, is saddened to discover his own daughter, Liberty, sharing the isolation of Vickers' fishing retreat ... However, unknown to Bob, Liberty is being blackmailed and trying to protect her sorry marriage to spineless rancher and cattle thief, Tom Tolliver. Meanwhile, ex-Pinkerton agent, Joshua Dillard, comes to Montana working undercover for Vickers' boss, cattle baron Barnaby Lant. The lynching and gunplay begin, but can Joshua bring justice to the range and save Liberty?