On a rainy night, a mysterious scholar arrives and leaves behind half of an ancient book, damaged and soaked with water stains, uncovering century-old secrets of a forgotten ancient family. Cheng Mo, the heir, sets out to pursue the truth, venturing into ancient buildings filled with symbolic puzzles and lost documents. As reality and history intertwine, he gradually approaches an astonishing secret powerful enough to shatter everything he thought he knew. This is not merely a quest to uncover a lost culture, but also a test of the soul concerning protection and difficult choices.