A heart transplant operation gave the girl Xia Zaoan a dual personality. The hidden personality with reasoning ability, Edison, led Xia Zaoan into a series of serial murder plots. In order to help her friend Xia Zaoan find the secret behind Edison's personality, the reasoning genius Mikaka formed a campus genius crime-solving duo with her. Classmates were kidnapped, the class teacher was killed, and the strange and mysterious senior Qi Mu, seemingly unrelated fragmentary clues were threaded into a line, and the murderer pointed directly to the mysterious organization called "Poker Cards". What is Poker Cards? Why did they carry out this serial murder? Who is Edison's true identity? There are mysteries behind the mysteries, and there is more than one truth.