Mikami was deceived by his friend and colleague detective Ishizuka, but he didn't know the fact and was forced to quit the job, and left Yokohama. But one day he heard from a person that the reason he had to quit the job was by Ishizuka's deceiving. and he wanted to solve the riddle.
Mikami returns to Yokohama again and knows that Ishizuka is now a businessman and was married to his former lover. Now Ishizuka tries to murder Mikami.[4][7][8]