Battle Tendency - Chapter 52 
The Wind, the Chariot, and Wamuu, Part 2 (風と戦車とワムウ その②, Kaze to Sensha to Wamū Sono 2), originally The Skeleton Heel Stone (骸骨の踵石, Gaikotsu no Kakato Ishi) in the WSJ and tankobon releases, is the fifty-second chapter of Battle Tendency and the ninety-sixth chapter of the JoJo's Bizarre Adventure manga.
The Ripple warriors versus the Pillar Men for the Red Stone of Aja and the future of mankind. The location has been decided: The Skeleton Heel Stone, a large stone circle arena where ancient humans would battle for glory and honor. To ensure they don't flee with the Stone, Kars demands Lisa Lisa to be a hostage.
Joseph leaves the mansion, carrying Messina on his back. JoJo finds the Stone in Lisa Lisa's suitcase, without a bomb. While going through her stuff, he finds an album with a picture of Erina along with a picture of Speedwagon, Erina, and Straizo with a baby in his arms.
JoJo arrives at The Skeleton Heel Stone with the Red Stone in hand. When he meets Lisa Lisa he asks about the photos. Lisa Lisa reveals that she was the baby that Jonathan Joestar had Erina save on the shipwreck fifty years ago.