He depicts the story of Arch, the gold-haired young man who lives in a secluded village of Crista, in the underground world. Ark-local violator of calm and lives in the house of the old man. Once, when there is no old man, some guys ask the arch to open a blue door, which has always been closed. Ark manages to open the door and inside, he takes it into the box. Opening the box, Ark opens as an ice curse for the residents of the village of Crysta, but also power to overcome the curse and completely change the world. There is always an isolated city of Crysta, there is a gate, and the ARC should go through various tests to restore life in the village, and on the way it will open a lot of secrets and will find a large goal that will bring it far beyond the reality known to him. .