The police of a small town are trying to find the cause of numerous brutal murders. The details of these murders are so monstrous that the police are requesting help from the federal authorities. A special squad arrives in the town, then another one. As a result, all roads converge to a mansion in which the surviving fighters of special forces find the cause of all incidents - aggressive zombies and mutants. These devils of hell, by all indications, until recently were people. It turns out that they have been changed by experiments conducted to obtain new weapons. But regardless of the reason, all monsters should be destroyed.
The game takes place in a mansion and in a dungeon near this mansion. Soldiers of special forces clear all these spaces from monsters. Everywhere there are disguised, hidden spaces, which can be opened only by taking separate efforts. Fighters also encounter a variety of mechanisms, which they can neutralize, and even a mutant plant. All this is not including very diverse, aggressive and dangerous monsters-muntants.