the game's protagonist is a mid–rank military officer who has an accident at his place of work. while he is unconscious, something happens and when he wakes up in a hospital he finds many homicidal mutants and the world in ruin. he fights with many homicidal mutants and investigates. he rarely meets with other survivors and encounters many surviving soldiers of the soviet army that are hostile to him and attempt to bring him to the high-ranking officer who tells him about the backstory behind this calamity before committing suicide.