The story is roughly about an intern college student who went out to climb a snow peak, but encountered an unprecedented large avalanche. Although he miraculously survived in the end, some scenes belonging to another person's experience always flashed in his mind, or another "him"'s own memory fragments, and because of this. Because of this unprecedented avalanche, the entire world has undergone tremendous changes. Some mysterious ruins buried deep in the ground and even in the sky slowly appear. People, animals, and bizarre things happen one after another. At the same time, a myth that has been passed down through the ages will once again emerge in front of the world...
Purpose: Survive.