Hell has invaded Earth, and only one man can stop it... junior account executive Dave Sloan, aka the Killer of Demons! With an angel at his side, Dave can see the demons that have infiltrated our world... and they all have to die! But these 'demons' are mostly Dave's co-workers at the office or people that annoy Dave in some way, leading him to believe that he's gone totally insane. Or has he? Now Dave must fight to survive and find out the truth... is he a whacked out mass murderer, or the last hope the world has against the forces of Hell?