Modern time-traveler Jiang Zhuo travels to ancient times, becoming a down-and-out fortune teller. Relying on the mysterious armor deduction system, he sets up a stall on the street, solves bizarre cases, and resolves crises for the common people. Relying further on the deduction system to gain cultivation techniques and prowess, he grows step by step from an obscure little fortune teller into a hidden master. As ultimate skills like the Golden Bell Shield and Flying Locust Stones awaken, Jiang Zhuo gets embroiled in Jianghu disputes, engages in confrontations with powerful tyrants and evil spirits, and carves out his own legend.