Josh Griffin is a Guardian; a demon hunter who along with fellow Guardians Bannon, Max, computer hacker Lisa, and Chief Gill Kane operate out of an underground base known as The Core. The history of demon hunters is a long one; they have operated in secret for centuries, attempting to maintain the balance of power as demons continually slip through the dimensional realm into our world. Josh is given an assignment to work with a special advisor out of the New York office, Alex Marlow. Alex, a fellow Guardian, is on the trail of a gang of demons who have stolen mysterious ancient artifacts from a Manhattan art dealer and are now on the loose somewhere in the L.A. underground. Their investigation eventually leads them to the warehouse district, where an occult group known as The Brotherhood unknowingly releases a powerful evil into our world known as the ancient demon Virago. Virago's aim is to open a doorway to hell, allowing a reign of demons to take over our world. With only a matter of hours left, Alex and Josh must find Virago and stop him before he turns Earth into a living hell.