Farina pondered while holding her chin: "You just mentioned that at the end of each passage, there's a door that cannot be opened."
"Yes, the passages start from different places, all leading to the core in the middle of the island. The note the captain obtained records that the author only knew of seven passages, but that was enough for him to sketch out a sectional diagram based on orientation.
"These passages lead to the same place, a circular, inaccessible giant enclosed space, called the 'Mechanical City Core'. This is where the passages get their name."
Zoe's eyes shone: "A new adventure again?"
Xiaomo looked at her with a smile: "I wouldn't call it an adventure; those doors can't be opened at all. It's just the background of the event."
