Shen Tang is an orphan girl adopted by the Marquis of Jing'an. She has an embarrassing status and is in a difficult situation. The legitimate daughter of the Hou Mansion was unwilling to marry the terminally ill young master of Zhenbei General Mansion, Pei Zheng, and was overjoyed, so Shen Tang was pushed out to replace her. Everyone was waiting to see her become a widow, be bullied, and finally disappear quietly. However, Shen Tang is obedient on the surface but as tough as cattails on the inside. She used her secret advantage of knowing pharmacology (non-system cheats, learned by herself) to protect herself in the general's mansion and deal with various forces. Not only did she resolve the evil servants, scheming sisters-in-law, and ambitious side branches who were causing the situation, but she also gradually uncovered the huge conspiracy behind her own life experience and her adoption by the Marquis. She and her "dying" husband Pei Zheng went from respecting each other like "ice" to being dependent on each other for life and death. The two joined forces to fight their way through the undercurrents of the inner house, the court, and the frontier. In the end, Shen Tang is no longer anyone's vassal or pawn. She has recovered her own identity, and has won the power and love she is proud of, and has achieved a magnificent counterattack from "a substitute for a married woman" to "a first-class imperial edict".
