Lin Wanzhen, the legitimate daughter of the Lin Mansion of the Dayin Dynasty, appears to be an aloof and gentle Buddhist lady, but in reality she is thoughtful and resourceful. Due to her mother's early death, she was neglected by the old lady and made things difficult for her by her concubine Lin Wanning. She was also involved in the conspiracy of her uncle Lin Zhengqing to seize the family property and covet the power in the court. Starting from the "Poisonous Wine Incident" when she was framed, Lin Wanzhen worked step by step, disguised as a "Buddhist", and secretly planned a counterattack: she saw through her concubine's frame-up, collected evidence of her uncle's poisoning, and colluded with officials, and formed a check and balance with General Xiao Jingyan of Zhenbei.
Inside the mansion, she battled wits and courage with Lin Wanning to expose his hypocritical mask; outside the court, she faced Lin Zhengqing's ambition for power and the threat of the deadly poison "Red Flame Powder" to stabilize the situation amid the spread of the plague and the undercurrent of war. From being trapped in the firewood shed to taking charge of the medicine shop, from the whirlpool of house fighting to the secret battle in the court, Lin Wanzhen relied on her clear mind, ruthless methods and "black-hearted" strategy above the bottom line to tear through the fog of conspiracy in many crises.
