Resonance of Fate takes place in the distant future where Earth has undergone a drastic change in the environment. For reasons unknown, poisonous layers of gases permeated the land, causing cancer, which resulted in near extinction for mankind due to humanity’s inability to adapt to the new changes. The remaining humans built a gigantic device called Basel, an environment purifier buried deep in the ground, which cleanses the air in the surrounding land; it was called the Zenith System. Civilization began to reform around Basel itself, building a city around the tower. In order to overcome the cancer, human lives were tied to quartz and linked to the Zenith system, making them immune to disease and mutation, but requiring them to remain in the city, and giving them a set shelf-life.
Civilization gradually began to grow around Basel, with people eventually moving inside the machine itself and building up the core, raising it high above the planet’s surface. As centuries went on, people built levels around the core and established various towns, cities, and even theme parks and landmarks for the survivors to enjoy themselves. However, Basel has now existed so long that people have forgotten why they live there, or that there is even a world outside Basel. The Cardinals, who are the political/religious leaders that foster a worship of Basel and its machinery, built their luxurious mansions in the uppermost layers of Basel, in the monster-free “Chandelier”, while the lower classes reside among the many districts built around the base and stem of the tower.