A government pilot (George Brent) falls for a woman (Isa Miranda) helping her partner (John Loder) smuggle diamonds out of South Africa.

Morioh, 1999—a normally quiet and peaceful town has recently become a hotbed of strange activity. Jōtarō Kūjō, now a marine biologist, heads to the mysterious town to meet Jōsuke Higashikata. While the two may seem like strangers at first, Jōsuke is actually the illegitimate child of Jōtarō's grandfather, Joseph Joestar. When they meet, Jōtarō realizes that he may have more in common with Jōsuke than just a blood relation. Along with the mild-mannered Kōichi Hirose and the boisterous Okuyasu Nijimura, the group dedicates themselves to investigating recent disappearances and other suspicious occurrences within Morioh. Aided by the power of Stands, the four men will encounter danger at every street corner, as it is up to them to unravel the town's secrets, before another occurs.

As the Boer War ends a South African soldier hides a cache of diamonds he finds on a body. He returns to the town he left three years earlier where his girl has married a disgraced English officer. Needing funds to get back to pick up the diamonds the Boer enlists the help of a fellow soldier as well as the Englishman and a local hotel keeper. This ill-assorted bunch set off into the bush intent on finding their fortune.