In a world similar to ours, ether appears and changes everything forever. While it grants humans unique powers, it has also brought forth the Calamities—sentient monsters with a single purpose: to wipe out humanity. The story takes place 1,000 years after the arrival of ether. We follow Sirius, a sharp-minded young man with a unique sense of humor, trying to survive in this chaos. But despite himself, he gets caught up in the pursuit of ether’s secrets and its true origin