The scientific madman Ye Fan in order to protect life has two person body through the exchange of the soul, and his new body but seemingly already and his wife are ambiguous. The offbeat love relationship forced Ye Fan to go on an uncertain Road, and more in the later figures caused shaking each other by. The detective involved in the song a strange combination of circumstances "Dutch act case", and this case was "demons" and he has been linked to. As the song step by step, but the truth behind the more profound.

剧中科学狂人叶凡为了保命通过交换灵魂拥有了两个人的身体,而自己新的身体却貌似早已和自己的爱人有着暧昧不清的关系。这另类的爱情关系迫使叶凡走上了一条前途未卜之路，更在后来与人物互相催化中引发了惊天悬案。侦探老宋阴差阳错的卷入这起普通的“自杀案”，而这个案子隐约和老宋的“心魔”有所关联。随着老宋的一步步调查，背后的真相反而愈加深沉。