The beginning of the G7 summit has arrived. The leaders of the seven countries, which now contain cities that have adopted the suicide law, gather together and share their stances on the suicide law. While the leaders debate the issue from the perspective of morality, economics, and rights, Alex poses a single question that cuts to the heart of the debate.
Zen Seizaki is a prosecutor with the Tokyo District Public Prosecutors' Office. While investigating illegal acts by a certain pharmaceutical company, Seizaki stumbles upon a page stained with a mixture of blood, hair and skin, along with the letter "F" scribbled all across the sheet. As he investigates further, the case goes beyond Zen's imagination and becomes vastly complex, challenging his sense of justice and his knowledge of the truth.
Digging deeper into the investigation, Zen begins to uncover a concealed plot behind the ongoing mayoral election and ties to many people of interest involved in the election and those closer than he thinks. The case grows more severe and propels Zen into an unforeseen hurricane of corruption and deceit behind the election, the establishment of the Shiniki district, and the mysterious woman associated with it all.
