Gulina, the daughter of Guyao, the gatekeeper of Shule ancient city in northern Xinjiang.

Not to mention Gulina, but to mention the old comrade, it is also a fairly magical figure.

He has been a gatekeeper in Shule for 30 years, witnessing the development and disappearance of an ancient underground city.

then disappears.

Countless people are looking for him, but they can't get any accurate information at all.

The only clue is his two children.

Old sons work in Shenzhen, and the exact circumstances are unknown.

It was Li Nan and Ye Xiaodao who came here to spy and protect the old daughter when she went to college in Pearl....