The old drainage system beneath Shen City connects many cities in the north - connected through old tunnels and abandoned passages, winding northward. The core area is concentrated under the third pier on the north bank of Shencheng Old Ferry. The entrance is hidden and has been covered by silt and grass for many years.
This is the secret guarded by Master. Extending from Shen City, the old road network covers many cities in the north - there are entrances to the cities along the route, which are guarded by Master's old friends, but they have not been maintained for many years.
Following the master's clues, we understood the master's instructions, so we decided to follow the master's path and help the master protect it.
In the end, Du is Luotang's fallen leaves returning to their roots, Xi Chi's refusal to cut off the blade without seeing blood, Wu Lian's life and death depends on me, Qingwu's perseverance, and Lin Xi's disability in both legs.
Concept: A group of orphans trust each other in the process of exploring the master's secrets, and follow each other in life and death.