Scientists claim that the instinct of self-preservation is the strongest among all instincts known to people? Someone doubts... Yes I did... There are such! But all doubts go like water in the sand when it comes to your own survival. And it is then that the realization comes that the monster is hiding in a person. A cruel and bloodthirsty creature who will do anything to achieve his goal. Sometimes such a creature completely squeezes out a person's personality, replacing him with his instincts. And sometimes... Man is still stronger than these very instincts. What will happen to the usual mechanic Sergey, who just went to the wrong place?