The ultimate stealth soldier known only as "Ghost" is called out of early retirement to stop a terrorist group called The Sons of Saskatchewan. The group has infiltrated a military base and must be stopped before they find the ultimate weapon hidden deep within its sub-levels.

The Sons of Saskatchewan claim to fight for world equality but their reckless tactics endanger more lives than they liberate. The group is lead by a military genius code named "London". No one knows London's true identity or the extent of his deceptive talents.