Everyone is being held against their will in a strange living organism called the ‘jail.’ This existence is punctuated by nearly daily torture regiments where they are abused physically to within an inch of their life (but rarely killed), inflicted pain such that they scream and wail or, oddly enough, asked to lick the walls for hours on end. This seemingly endless abuse is done to satisfy the carnal desires of the jail – which seems to both enjoy and gain power from the suffering of its occupants. Marchens are the creatures that are native to the jail, and humans are their victims.
Source: N4G PC Mary Skelter: Nightmares review – ChristCenteredGamer