When a psychiatric doctor researches a young girls diary to find out why she murdered her entire family, he begins to fall into the same state of insomnia and confusion that led her to lose her mind.

當一位肉体科醫生研讨年輕女孩莫莉的日記，找出她謀殺整個家庭的缘由時，他也開始堕入失眠和混亂的狀態，這也是導致她失掉明智的缘由，一連串不可思議的事情接連發生…