High above a ruined earth, the floating city of Aeros survives on steam, gears, and a dwindling supply of magic. When a reclusive clockwork botanist named Lyra discovers a mythical, living seed capable of growing a mechanical tree that breathes pure air, she becomes the target of the city’s greedy cog-barons. Forced to flee her sanctuary, Lyra must team up with a rogue sky-pirate and her sentient brass owl to navigate the perilous lower decks and plant the seed at the city’s dying core before the toxic smog consumes them all.
