The world is like a huge ice ball, and the ice has swallowed up the old civilization.
When mankind perished, the "Fire" project was launched and the [Ice Wall] was built to preserve the fire of civilization.
Thousands of years later, fire successfully gave birth to new humans and civilization restarted. However, the fire plan was not perfect, and civilization was faulty and differentiated and mutated.
New humans have been surrounded by a huge ice wall since their birth.
The protagonist Linn was born inside the ice wall since childhood, and has always wanted to go to the unknown territory outside the ice wall that no one has ever set foot in.
This is an epic pursuit of ancient civilization.
