The underground that leads you to the fountain for one of the 3 items that gets you the photo to open the gate with?
The chase can't happen until you get the clock hands normally, there is a guide someone made if you wanna rely on that for specific details
https://mega.nz/file/KdkiiSBT#_rjQUv6QP3uYBddeK6XW4dumDoviQwIqGKBZiZAE2j8