Two physicians, the youthful, enthusiastic, and popular Osanai alongside the seasoned, ambitious Tatsugaura, are both probing the enigmatic 'Monmow' disease. This ailment, identified exclusively in a single isolated village, triggers grotesque skeletal deformities that grant sufferers a bestial visage prior to their demise. Tatsugaura dispatches Osanai to the village to determine the disease's origin while providing optimal care to the afflicted. In truth, however, Tatsugaura is plotting against Osanai, intending to infect him with the disease to eliminate any hindrances to showcasing his own research, thereby securing elevated status and rank within the medical community.