In the floating city of Orizon, harmony is not an abstract ideal, but the exact physical foundation of existence. Everything-from the glowing crystal towers to the flying platforms-is powered by the resonance of the human soul. As an analyst for frequency harmonics, Aelia understands the technical perfection of this world better than anyone. But then, the impossible happens: the crystals shatter, the city begins to lose altitude, and the silence becomes a threat.