There is a huge, unfathomable hole on the Blue Star that leads to the ground.
After centuries of changes, Blue Star's top scientists have been exploring the secrets of the cave.
However, the truth is like being shrouded in fog. No matter how advanced the instruments or how experienced the expedition team is, they will be swallowed up and disappear as soon as they enter the cave.
This mysterious cave was sealed and became a forbidden area for life.
Until one day, a man in strange clothes crawled out of the cave cursing and muttering in Chinese language:
"I'm finally back!"
