Ryosuke Yoshii, an enigmatic young man known online as ‘Ratel’, earns by cleverly reselling goods. His life takes an unexpected turn when a masked man suddenly appears before him and he hears a threatening voice exclaim, “I will kill this guy!” while viewing an online screen filled with hate messages directed at his pseudonym. Who is the mysterious masked man, and why has Ryosuke become a target? The answers lie hidden among the shadows of the digital world and its darkest secrets.