Guo Ziyi quells the rebellion of An and Shi that threatens to overthrow the Tang Dynasty and helps recover the capital Chang'an. Due to his distinguished service, he is made Lord of Fenyang. Furthermore, the emperor marries his daughter, Princess Shengping, to Ziyi's son, Guo Ai.
Other than the fact that the princess is pampered and haughty, the wedded make a loving couple. On the birthday of Guo Ziyi, many officials come to congratulate him. All his sons and daughters-in-law are present except for the princess, who thinks it below herself to attend. Sitting alone, Guo Ai is scorned by his brothers and sisters-in-law. Out of depression, Guo Ai gets blind drunk and, back in the palace, vents his anger by breaking a lantern. When he encounters the princess, they begin to fight. Shamed and enraged by her excuses, he slaps her and scolds her.
Unable to bear such an unprecedented punishment, the princess goes into the palace in tears to complain to her father. Learning of what has happened, Ziyi is so terrified that he enters the palace with his son in shackles to apologize. Remembering the meritorious service of the Guos and not taking the family quarrel seriously, the emperor rewards Guo Ai instead of punishing him. The empress admonishes the princess to show more respect for and love to the family of her husband. The emperor orders the princess to go home and apologize. The couple makes up.