Shen Zhixing, the true young master of the Shen family, was switched by Qiao Man and plunged into the Black Stone mining area, suffering endless torment in the sunless mine pits. His father, Shen Yueting, recognized his biological son by the moon-shaped birthmark on his right hand, but chose to bide his time. Using the fake heir as bait, he investigated the mastermind Pei Wanshan. Father and son secretly joined forces, setting up a series of traps with fake account books and the Xizhou poisonous land, forcing their enemies into bankruptcy and voluntary surrender, while allowing Shen Zhixing to reclaim his identity and life.