In a stonepunk world where gravity has become a luxury, sound waves cut boulders and cities float in the air. Cade, the cloud herder, drives an airship and herds the "cloud whale", a giant creature that can generate an anti-gravity field. When my sister suffers from incurable petrification, only the legendary "Life Meteor" that can reverse death can bring hope. However, while he was chasing the trajectory of the meteor, the planet itself was falling into a deeper crisis: the gravity field was rapidly attenuating, the atmosphere was escaping, and the guild that monopolized gravity was planning a cruel escape plan. Cade gradually discovers that the docile cloud whales are actually the sacrificial incarnations of ancient sages who maintain the fragile balance of the world. He must make a choice between saving his loved ones and repairing the planet, and the answer lies deep between the call of the stars and the last cry of the earth's core.
