The 'G' in Guts (ガッツの「G」 Gattsu no 'G'), originally Uncover the Boss' Secret!! (ボスの謎を探れ!! Bosu no Nazo o Sagure!!) in the WSJ release, is the five hundred twenty-fourth chapter of the JoJo's Bizarre Adventure manga. It is also the eighty-fifth chapter of Vento Aureo.
The group of rebels, composed of Giorno Giovanna, Bruno Bucciarati, Guido Mista, Narancia Ghirga, Leone Abbacchio, and Trish Una, stop by a restaurant to have lunch. While the group beats up a bystander, mistaking him for an enemy, Giorno thinks about Bucciarati's state, choosing not to reveal anything for the time being.
Bucciarati reveals that the Boss' power is to erase time, and deems it impossible to beat head-on. The group then opts to investigate the Boss' past so they can ambush him and decide to begin by asking Trish for any lead. She readily accepts, determined to confront her father, and reveals that her mother met the Boss on the island of Sardinia.
Meanwhile, Narancia sees a shark in his soup.