Professor Freeman is an important English scientist that is investigating a method to treat cancer. His daughter is killed in the swimming pool of a hotel in Beirut. The case is confidential so that the mission is entrusted to the Special Agent Mikel Brown.

Spaghetti Western icon Anthony Steffen stars as Shenandoah, a man of mystery who joins a vicious band of highwaymen after passing a near impossible and death defying initiation. When the gang begins to suspect Shenandoah may be a traitor in their midst; they learn the real reason he joined their degenerate gang of thieves: retribution.