The Stand-In Matriarch's Revenge

Bai Chulan, chieftain of Black Wind Stronghold, flees to the capital after a military crackdown and reunites with her long‑lost twin sister Bai Chuyi, mistress of Marquis Zhenguo Manor. Fatally poisoned, Bai Chuyi begs her sister to take her place: recover the Bai dowry and save her three spoiled legitimate children. Disguised as the marchioness, Bai Chulan imposes order with jianghu tactics and nurtures the kids. She finally exposes Gu Xiuyuan’s treason and his old frame‑up of Black Wind Stronghold, avenging all injustices.