A school trip aimed at visiting archaeological sites transforms into an unexpected incident. The cruise group encounters a sandstorm in which a young boy named Wubin loses a group out of sight. Looking for a shelter he finds a mysterious entrance in the rocks. Terrified by the conditions outside, with no other choice, he goes inside.
The whole adventure takes place in underground ruins and dark caves. Wubin has to face a number of puzzles and jigsaws to find the exit. There are various creatures on the road, some of them hindering the journey, others are part of the riddles.