Read : Two Laughing Ladies

Seventeen people are poisoned at a banquet hall of a luxury hotel.
One of the victims, Koichi Hisaka, a member of the Diet, was clutching a piece of paper marked “1”.
An analysis of security camera footage reveals a shocking revelation.
It showed “Sayuri Udo,” who was involved in a series of bizarre murders that shook the world, escaped from a medical prison, and was wanted for murder.
In addition, a series of new incidents occur, including the bombing of a large bus and the arson murder of a junior high school building (……)!
At the crime scene, there is always a mysterious number tag and a trace of Sayuri Udo left behind.
Sayuri was committing the murders by means instructed by a “certain woman,” but the investigation headquarters had no way of knowing this, and the death toll continues to rise, with the number of victims now numbering 49. ……

Eleven years after her debut, the third dark heroine mystery by a popular author with an ever more brilliant pen for twists and turns is finally published!