The nefarious organization, Doress, employs unscrupulous tactics to victimize the innocent youth, Ikuroo. They implant a parasite called Baoh in his brain, a dreadful creature that bestows Ikuroo with near-immortality and the ability to transform into a fearsome beast in times of danger. Doress seeks to exploit Ikuroo for their personal gain, be it financial or geopolitical dominance. However, during a train ride, a captive young psychic named Sumire releases Ikuroo, and together they flee from their captors. Meanwhile, the notorious Dr. Kasuminome, the mastermind behind the Baoh project, is determined to reclaim his experimental subject. He has a formidable army of superpowered minions at his disposal.