When the Sky Whales' hidden sanctuary falls silent, the fate of the sky rests on two heroes: Veridia, the indigo dragon, and her wise bat companion, Nocturne. They brave treacherous high-altitude currents to enter the legendary Nebula Drift, where they must restore three magical sound Echoes--the Deep Hum, Mid-Chime, and High Squeak. Using Veridia's strength and Nocturne's sonic precision, the inseparable friends race against time to reactivate the sanctuary's protection, proving that no challenge is too great for their remarkable teamwork.