Synopsis

On New Year's Eve a fashionable couple depart for a party with a doctor and his wife, leaving their precocious children 3 pre teen boys and a girl in the care of a new baby sitter whose conscience requires her to announce that she recently recovered from a nervous breakdown. The children proceed to torture the baby sitter, beginning with a story of how a previous baby sitter dropped dead right before their eyes of a heart attack, proceeding through sadistic turns, including a pitch at lovemaking by first the boy and then the girl, and ending with a tumble down the stairs On returning home, the sitter is not able to convince the parents that it all happened; they merely think her still mentally unstable. Then we in turn see in the viciousness of the parents the source of the children's diabolism