It was said that the Mysterious Garden was a place created by a research institution prior to Doomsday. They had accidentally discovered a particular plant, capable of extracting a substance from it that could delay aging, hence, it resembled a laboratory.
In addition to studying this plant, they also cultivated many rare plants for research. After Doomsday, this place gradually fell into disrepair and turned into a secret realm of the 30th level where many plants became aggressive. Anyone who trespassed here would be attacked by them.
The most significant thing was that this secret garden was very discreet, and its information was deliberately concealed. Even players born in the City of Sin were rarely aware of it.
From Anna, Song Jian learned that the level of this secret garden was far lower than that of the Dark Castle. It was merely a small three-person dungeon, without any first-order combat creatures inside, so Song Jian was quite at ease accompanying Anna there.
