A bizarre lightning strike brings Jiang Xiaoman to an ancient marquis's estate, where she becomes a kitchen maid doing hard labor and accidentally unlocks the unique ability to understand baby talk. The young master of the estate cries and fusses all day long, and doctors from all walks of life are helpless. Xiaoman uses baby talk to find out the truth and gains the appreciation of the heir's wife. The back courtyard of the estate is undercurrents of surging tension, with concubines plotting against each other, and the conflicts of the imperial court also spread here, with young children being used as chess pieces in struggles. Xiaoman listens to the secrets deep in children's hearts, sees through one conspiracy and dirty trick after another, maneuvers between nobles and power figures, pioneers a baby supplies business, plans step by step, and strives to get rid of her slave status and master her own destiny.