In order to save her pet Xiaobai, princess Jiang Yu forced her way into the palace to ask for help from her tyrant father. Unexpectedly, all her voice was heard by the emperor Jiang Zheng, who had the ability to read minds. She has no pure thoughts of the city, exposes the hypocrisy of the courtiers, cures the tyrant's loneliness, and is praised by the tyrant as the apple of his eye. Through his mother's secret protection and his gentle elder brother's company all the way, Jiang Yu grew up step by step in love with his transparent heart.