Years after an ancient evil was salvaged from the depths of the sea, Joutarou Kuujou sits peacefully within a Japanese jail cell. He's committed no crime yet demands he not be released, believing he's been possessed by an evil spirit capable of harming those around him. Concerned for her son, Holly Kuujou asks her father, Joseph Joestar, to convince Joutarou to leave the prison. Joseph informs his grandson that the "evil spirit" is in fact something called a "Stand," the physical manifestation of one's fighting spirit which can adopt a variety of deadly forms. After a fiery brawl with Joseph's friend Mohammed Avdol, Joutarou is forced out of his cell and begins learning how to control the power of his Stand.