An Ancient Tomb Adventure Not for the Faint of Heart

Lin Yu, a university teacher in the history department, has liked all kinds of strange things since he was a child, and his dream since he was a child is to be an archaeologist. But Grandpa firmly opposed it, claiming that if he dared to choose archeology, he would break his legs. Lin Yu often used his vacations to secretly go out for adventures. However, this expedition really plunged him into an endless abyss. Everything he encountered seemed to be controlled by an invisible black hand? Who is the mastermind behind this? What could be its purpose? What kind of secret is there behind this...