Three days after Dio's attack on him and his father, JoJo awakens to find Erina nursing him back to health in a hospital. A strange man named Will A. Zeppeli arrives and shows JoJo how to employ the Ripple, which uses the energy of one's body to perform impressive feats of strength. Zeppeli also reveals that Dio is still alive and it is JoJo's destiny to defeat the stone mask. Meanwhile, Dio continues to prowl London, recruiting the vilest men, including Jack the Ripper, into his undead army. As Zeppeli trains JoJo to master the Ripple, he explains that as one of the first modern people to discover the stone mask and witness its dark powers, he has dedicated himself to mastering the Ripple in order to destroy the mask. While traveling to Windknights Lot, where people have been disappearing, JoJo and Zeppeli must fend off Jack the Ripper. Under Zeppeli's tutelage, JoJo finally understands the Ripple and kills Jack from behind a wall using his own Ripple technique: Overdrive.