An exploration of the case of the Golden State Killer who terrorized California in the 1970s and 1980s, committing 50 sexual assaults and 10 murders, and true crime author Michelle McNamara's obsessive quest to find justice on behalf of his victims.

Shirakawa Jiro is a genius author. At the age of 15, his novel won the top prize. He has written 99 mystery novels as a trick genius since then. Shirakawa is tackling what would be his milestone 100th novel, but he has not been able to write anything and this has gone on for more than three months. Aonuma Kiryu is a genius interviewer who is able to get people to loosen their tongues. Shirakawa who takes pleasure in being a fake, has become the transforming interviewer Aonuma Kiryu in order to listen to what people say. He has no interest in the truth but seeks a real case which he had found through the internet as subject matter for his 100th novel. It is the unsolved Tulip Murders in which the grotesque abandoned corpses of two housewives were followed by yet another murder one year later. Together with a pretty editor, Shirakawa heads to the town where the cases occurred. As Aonuma, he gets close to the hidden truth with his formidable powers of deduction.