Li Yu is a young man with a secret past and special skills. Using his identity as a "detective" as a narrative carrier, he is deeply involved in a shocking case that spans many years. He is both the "key" to the puzzle and a part of the puzzle himself. His journey of pursuit is not only a search for justice, but also a fateful journey of self-identity.
He is not only a classical "Bao Gong"-style upright official detective, but also a modern hero with confusion about growth and identity. This composite positioning allows him to not only carry the traditional suspenseful crime-solving function, but also arouse the emotional resonance of contemporary readers.
