Chen Yuan, a decadent antique shop owner, unexpectedly received a strange express delivery from his missing grandfather: a fake book written in "corpse language" and a bronze pointer that always points to the depths of the Qinling Mountains.
Forced into the underground world, he met Ajiu, a "living dead" with no memory and mysterious skills, and Ma Rushan, a professor who talked about running trains but had special skills. The three of them went deep into the underground palace of the "Mute Kingdom" in the Western Zhou Dynasty, and discovered the truth that subverted their understanding: the "Guanshan Taibao" mark guarded by the Chen Yuan family for generations actually had the same origin as the sinner mark of the ancient "Land of the Immortal"; and the last warning left by his grandfather was to "don't trust Ah Jiu".
