In the footsteps of Makishima, Public Security splits into two groups to find him: Akane and Kôgami set off towards the top of the Nona Tower, while Kagari inspected the basement. Will Kôgami finally manage to get hold of the man he has been looking for for so long? Kagari, for his part, approaches the heart of the Sibyl System without knowing it... and without measuring the danger!