Long after the floating cities vanished and the world fell into ruin, the relics of the ancient Sky Order remain—buried beneath stone, myth, and silence.
Shu, an exiled warrior burdened by a haunted past, dares to cross the deadly Arken Spine in search of one such relic: the Sky Key—a long-lost artifact said to unlock the secrets of the vanished sky temples… and perhaps restore what the world has forgotten.
But Shu is not alone in his pursuit. Powerful enemies close in—imperial hunters, rogue machines, and remnants of a war that never truly ended. Caught between collapsing ruins and rising threats, Shu must rely on his blades, his instincts, and the voice of a distant ally to survive the journey into a forgotten age.
What he discovers could save the world.
Or awaken something far worse.