Jolyne, Ermes, and their new ally F.F.-a colony of plankton given human form and consciousness-manage to defeat the enemy Stand Mary Lynn Manson and recover Jotaro's Stand disc. The Speedwagon Foundation devises a plan to get the disc out of the prison, which involves Jolyne teaming up with another new ally, Weather Forecast. After a literally suffocating battle en route to the rendezvous point, Jolyne encounters an enigmatic priest who seems to offer salvation...