The order comes down from Interpol and soon Cabot Cain joins his friend Colonel Fenrek in the frantic search for Major Loveless, a ruthless mercenary soldier notorious for his disregard of human life. Without any clues and with only a vague description of this callous killer, Cain is off on a trail that takes him from the streets of Lisbon to the very depths of the ocean floor, where he will come face to face with his enemy in deadly underwater combat. For getting Loveless is imperative before he has a chance to unleash a deadly nerve agent upon an unsuspecting city if ransoms are not paid.