Lu Youning, who suffered brutal persecution in his past life, is reborn as a concubine-born son still in swaddling clothes in the Marquis of Chengen's estate. His father, Lu Shiyan, is an iron-faced Censor who started as the top scholar, with a cold temperament due to childhood trauma. Lady Qin, the estate's lawful mother, views Lu Youning as a thorn in her side, repeatedly plotting to harm him. Relying on his memories of rebirth to avert crises, Lu Youning gradually opens Lu Shiyan's eyes to the inner courtyard's conspiracies, and the father and son slowly come to trust each other.