When Ridge Parkman comes across the body of a fellow U.S. Marshal, hung unceremoniously in a tree in the wilds of the Colorado Rockies, he knows he cannot rest until the murder of his friend is avenged. The trail of the murderers eventually leads him to a notorious outlaw strongholds, The Havens, where another marshal is being held captive and facing an ugly execution. Working alone and undercover, with time itself as yet another foe, Parkman must come up with a plan to save his friend's neck, and his own as well.