Two young doctors, passionate and beloved Osanay and ambitious Tatsugura, examine the mysterious disease "Monmo", found only in a remote village, which causes a strange deformation of the bone, forcing their victims to acquire the view of the beast before death. . Osanay, stuck between the charm of his city medical world and the rural world, which offers a remote village, does everything possible to help victims to preserve their humanity in front of a medical institution, which considers them only as guinea pigs and rarities. Meanwhile, Tatsugura plans against Osana and tries to infect his opponent with a disease to get fame, exploring the results.