A series of murders targeting former boxers in a Tokyo park sets two detectives on a trail leading to three suspects from the elite Kongo Boxing Gym: Chinen, a genius fighter combining sanctity and bestiality; Kiritani Kengo, a forgotten former champion; and Kanaki Amelia, known as the crusher of the underworld. All three are preparing for a world title match one month away. A crime suspense novel centered on professional boxing, blending entertainment with socially-conscious mystery.

For what reason do you swing your fist? At that moment, is your fist trembling?