本片是一部西德剧情片，由Karl·Heinz Kramberg导演，由汉斯·克拉林/费迪·梅恩主演。
剧情简介：A man is sitting in a padded cell. He remembers how he got there. Munich in the run-up to Christmas: The loner roams the city, has abnormal ideas when looking at the most harmless things and wants to turn his perverse fantasies into reality. To do this, he chooses an old man whom he happens to see in a shop. He perfectly plans a perfidious, cruel murder.
外文名：Das verräterische Herz
类型：剧情 / 惊悚 / 恐怖
地区：西德
导演：Karl·Heinz Kramberg
编剧：Karl·Heinz Kramberg / 埃德加·爱伦·坡
演员：汉斯·克拉林 / 费迪·梅恩
