1921年的英格兰一直笼罩在第一次世界大战的阴影中。女作家佛罗伦丝对未婚夫死于战场一直没有办法释怀，她经常和警察联手，用自己的推理能力揭穿灵异现象和谎言。这天，佛罗伦丝再次接待了特殊的访客罗伯特，罗伯特是一个寄宿学校的老师，因为学校发生了一起学生上网的案件，但是一直在学校流传这小男孩的鬼魂的灵异事件。佛罗伦丝听后随着罗伯特来到了学校查看，希望能在好到证据，但是却意外发现了学生真正的死因。学生们放假后，学校只剩下罗伯特和女管家以及一个孤儿汤姆。学校再次出现灵异事件，但是真相却令大家大跌眼镜。原来，汤姆和佛罗伦丝是一对亲姐弟，他们的父亲疯狂的杀死了母亲后，又想要杀死看到了一切的佛罗伦丝，汤姆代替佛罗伦丝死后成为了她心里的阴影。如今佛罗伦丝都想起来了，但是童年的记忆对自己来说只有可怕和痛哭。

England in 1921 has been haunted by the shadow of the First World War. The female writer Florence has never been able to let go of her fiancé's death on the battlefield. She often joins forces with the police to expose supernatural phenomena and lies with her reasoning ability. On this day, Florence once again received a special visitor, Robert. Robert is a boarding school teacher, because there was a case of students surfing the Internet in the school, but the ghost of the little boy's ghost has been circulating in the school. After hearing this, Florence followed Robert to the school to check, hoping to get evidence, but accidentally discovered the real cause of death of the student. After the students are on vacation, only Robert, the housekeeper and an orphan Tom are left in the school. Another supernatural event occurred in the school, but the truth surprised everyone. It turns out that Tom and Florence are a pair of siblings. After their father killed their mother madly, he wanted to kill Florence who had seen everything. After Tom died instead of Florence, he became The shadow of her heart. Florence remembered it now, but her childhood memories were only scary and crying for her