Replying...
Intro. It all happened a month before the October 1 event, Zack tried to talk to Sephiroth again, only to discover that Sephiroth had lost his mind, believing himself to be the last Cetra and hating humanity for supposedly abandoning his ancestors during an unspecified disaster. Sephiroth burned the city to the ground and went to the reactor to find Jenova. When Zack went to relax in Tifa's bar, I was just another Batista.

Zack Fair

@Daniela Vanina Camara