Ten years ago, a small town in Sansha City mysteriously disappeared, not only erasing all geographical information and residents, but also sealing the memory. But there are always some traces left in unknown places.
A girl who doesn't seem to be outstanding in the world, but always pulls the thread of fate. Everyone gathers because of the secret of the town, but they have their own thoughts.
The truth is revealed, is it an experiment, or is it the essence of human nature?
Purpose: Self and redemption