Jodio Joestar is a fifteen-year-old gangster on Oahu, Hawaii, with a single declared goal: to become filthy rich. Alongside his brother Dragona, comrade Paco Labrantes, and Stand user Usagi Aloha'oe, Jodio's crew breaks into the Hawaiian villa of a wealthy Japanese tourist, only to find the house belongs to manga artist Rohan Kishibe — and that a piece of volcanic rock locked in the safe alongside their target diamond may be worth far more.