In "Quiet Sleep" you perform the role of a military man who arrived at point "M" to guard the medical center.
According to the head of security, toxic gas got into the air, which resulted in irreversible consequences.
It is rumored that in the neighboring villages people go to bed and wake up completely differently.
They behave abnormally, they are very aggressive and attack other people, knowing neither fear nor pity.

You can protect the medical center alone or with friends, each one can choose a character to his taste.