In the clockwork city of Aethelburg, brilliant but chaotic alchemist Kaelen crosses paths with Lyra, a stoic Aether Knight whose life depends on a failing clockwork heart of brass and crystal. When her Aether-Kinetic Core begins to fracture, Lyra risks death each time she fights. Kaelen discovers the heart’s flaw is not mechanical, but resonant—its harmony with life itself is breaking. To save her, they must journey into the deadly Whispering Woods to gather rare Starlight Moss. As science, magic, and fate intertwine, both are forced to redefine what it truly means to keep a heart alive.