The story is set in modern-day Tokyo and the isolated island of Onikobejima in the Pacific Ocean. Ryuusei Azumaya, who has the ability to inhale cancer cells, pathogenic bacteria, toxins, etc. from patients and transmit them to the bodies of third parties, rescues patients affected by incurable diseases while punishing the evil spirits who torment innocent people. A supernatural battle action story depicting The story of good, punishment, and evil, in which Ryusei uses his powers to take revenge on criminals such as con artists and drug dealers who defraud large sums of money by pretending that it is a cure-all for illness.