In the floating city of Ormos, magic and technology coexist, but they are suspicious of each other. Danshu, a young man who lives on the street because his father was falsely accused of being a "heretical technician", accidentally obtains the "Eye of the Abyss" that can analyze magic runes and mechanical logic. When a series of strange murders tear apart the prosperity on the city's surface, magicians, engineers and invisible underground forces emerge one after another. Dan Shu walks between light and shadow with a unique perspective, solving every seemingly unsolvable mystery, just to uncover the truth behind his father's case. But as the truth approaches, he discovers that all this is just a chess game for the lost plan of ancient magic, and he is also a piece on the chess board. Belief in magic, rationality in technology, fetters of family - how should he choose? "The answer may be more deadly than the puzzle." Every domino knocked down is a new game.
