In the floating sky-city of Aetheria, energy is everything. The city is powered by ancient, glowing artifacts known as the Aether Cores. For centuries, the High Arcanists have maintained that these cores are eternal, divine gifts.But Lyra, a brilliant but cynical lower-tier mechanic, knows the truth: the cores are dying.When a catastrophic power failure plunges her lower-district slum into darkness, Lyra discovers a hidden chamber beneath the city's underbelly. Inside lies a deactivated, obsidian core—one that doesn't run on light, but on a strange, forbidden void energy. Alongside Kael, a disgraced sky-captain with a broken ship and a sarcastic streak, Lyra must ignite the forgotten core before the city plummets from the clouds. But someone in the high council wants the past to stay buried, no matter the body count.