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.

《如梦初醒》中著名的钢琴家Birgit有一个看似谐和的婚姻与丈夫弗雷德里克由于他们的温馨的财务状况,他们有足够的钱让弗雷德里克成为一个汽车经销商一天，Birgit怀疑丈夫有外遇，弗雷德里克坚决否认.

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…