A secret hidden beneath an idyllic island escapes killing all those above. ATLAS is called in to investigate. ATLAS is Advanced Threat, Locate And Secure, a global unit set up between the US, UK, France and Germany and they discover more than just the cause of the disaster. They discover a threat more dangerous, more lethal than anything dreamt of in their worst nightmares. Colonel Jack Flynn aided by Colonel Mary Qui of Med Division head out to Paradise Cove with Alpha Team of the SHARC's, (Special Hot zone Armed Response Commandos) the teeth of ATLAS. They are soon fighting for their lives against a seemingly unstoppable enemy and a para-military group that will go to any lengths to prevent them learning the truth. Paradise Cove cannot contain the threat and Jack and Mary follow it to the United States where they have to locate it before it can be unleashed upon an unsuspecting population. In a race against time Jack and ATLAS must face off against an enemy transformed by genetic manipulation who wants to exact a devastating revenge on those responsible for his plight and a world that had forsaken him. Can Jack stop him before he releases the Satan Strain on an unsuspecting world?