A small town suddenly transferred to a strange continent called "Abbot" and temporarily settled down with the help of the Four Sacred Beasts.
The protagonist (codenamed "Gray") who lost his memory was ordered to be in danger. As the captain of the Angel team, he led the "angels", the contractors of the sacred beasts, to adventure in other worlds, find missing people, ensure survival resources, and finally return to the original world.
However, the abbot's world is not a paradise. The unknown world is full of haze and abyss.
The protagonist is slowly involved in various incidents, and eventually becomes a magnificent legend.
