The mysterious psychology expert Bo Jinyan (played by Huo Jianhua) recruited senior student Jian Yao (played by Ma Sichun) as a translator and life assistant. On the one hand, he used his high IQ and professional knowledge to teach Jian Yao and trained her to be a detective assistant. The two worked together to solve difficult homicide cases such as the serial disappearance of teenagers; on the other hand, he gradually fell in love with Jian Yao during their daily interactions, and the huge contrast between his high IQ and low EQ also added a lot of fun to this relationship. As the relationship between the two gradually warmed up, danger was also quietly approaching. A few years ago, Bo Jinyan, the youngest professor of criminal psychology at the University of Maryland, was in the United States to investigate the sensational "Flower Cannibal" case and had a confrontation with the cannibal Xie Han (played by Zhang Luyi). Jian Yao was kidnapped by Xie Han, and all this was just to force out Bo Jinyan's so-called second personality... In order to save Jian Yao, Bo Jinyan, with the help of his friends Li Xunran (played by Wang Kai) and Fu Ziyu (played by Yin Zheng), cleverly dealt with Xie Han and finally rescued Jian Yao and punished the murderer Xie Han. The drama is adapted from Ding Mo's novel of the same name.