The "Son of Araragi Incident," a mass murder that would later cause a great deal of public uproar. Detective Seto Masato, who has been pursuing the mystery, finally forces an illegal undercover investigation. However, just as he is about to get to the bottom of the case, he makes an irreversible mistake...! Can he atone for his crime? A story of "true" regeneration of the mind and body, centered on the Department of Rehabilitation Medicine. A new innovation in medical comics!