After years as an MI6 operative, Sylvia winds up in a village in Umbria visiting her sister Isabel and becomes involved in a murder investigation.

Two Swedish business men are kidnapped in Rome by the Mob, and moved to Sicily. Carl Hamilton is sent to Sicily on direct order from the Swedish Government. He is sent to negotiate for their release. Hamiltons partner and best friend, Lundwall, is murdered by the Mob. Hamilton is dragged into a bitter and brutal vendetta between himself and the Mob-leader Don Tommaso.