Winifred Notty arrives at Ensor House prepared to play the perfect Victorian governess. She’ll dutifully tutor her charges, Drusilla and Andrew, tell them bedtime stories, and only joke about eating children. But the longer Winifred spends within the estate’s dreary confines and the more she learns of the perversions and pathetic preoccupations of the Pounds family, the more trouble she has sticking to her plan.

Whether creeping across the moonlit lawns in her undergarments or gently tormenting the house staff, Winifred struggles at every turn to stifle the horrid compulsions of her past until her chillingly dark imagination breaches the feeble boundary of reality on Christmas morning.