In this stylish and atmospheric psychological thriller, a wealthy author's wife's comfortable life turns into a terrifying nightmare when her young stepson starts exhibiting strange behavior. The fiendish child is out to destroy all the trust and love between his father and stepmother with his surreptitious pranks. Horror unfolds as the boy devilishly plots to drive a wedge deeper and deeper between them. But is the child really a fiend, or is he the victim of his neurotic stepmother's paranoia?