The Sad Mountain Sounds

The protagonist and his sister accepted the most dangerous commission from ancient times, and the price was eye-catching. The protagonists accepted the dangerous commission, but when they arrived at the destination, the boss had a strange and dangerous aura. The people who accompanied them on the road were always replaced at the new stage. What is hidden here? What kind of place is Manqishan... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.