Final Fantasy VII Walkthrough

1.7: To Sector 7 Again

Head back down and out through the Sector 5 slum. Start to go north-west, where Aeris joins you. Go up into a section that has a lot of bridges and tunnels made out of debris. You want to go down the pink bridge, through the tunnel there that's a little hard to see, then around. Near an abandoned yellow vehicle, you need to go up a pinkish-brown pipe which isn't very obviously on the ground. Follow Aeris, have a conversation, then you'll see something suspicious near Sector 7.