In 2011, the town of Morioh is transformed by the appearance of mysterious rock formations following an earthquake. Near one of them, Yasuho Hirose discovers an amnesiac young man whom she temporarily names Josuke Higashikata. Unable to remember his identity, Josuke begins investigating his origins and quickly learns that his existence is connected to several Morioh families, strange phenomena, and a fruit with extraordinary properties. Using his Stand, Soft & Wet, he confronts various Stand users while trying to understand who he was before losing his memory. His investigation gradually uncovers a web of family secrets, rivalries, and hidden interests surrounding the town.