Su Weiwan had no family to rely on, so in order to protect her young brother Su Nian'an (who was adopted by the general Xiao Ce), she was forced to marry into the general's mansion as a concubine. In the mansion, the main wife Liu is from a well-known family and has ruthless methods. The other concubines have their own agendas, and there is an undercurrent in the backyard. Su Weiwan relied on the "House Fighting Notes" left by her mother to unravel the Liu family's many frame-ups. She also used her keen observation to gain insight into people's hearts, secretly wooed maids and bribed cooks, and gradually built up her power. Xiao Ce, who has been fighting for many years, initially ignored the disputes in the backyard, but was gradually moved by Su Weiwan's wisdom and the tenacity of his guardian brother, and began to pay attention to her. In the end, Su Weiwan exposed the truth about Liu's murder of his ex-wife and ordered him to be dismissed. She took charge of the backyard of the General's Mansion to maintain a stable world for Su Nian'an.
