Shen Yanci, the seventh prince of Dayao, became a palace slave and exchanged identities with the prince. His fiancee, Su Qingyan, married into the East Palace and remained a widow for three years, raising an orphan without knowing that her husband was fake. When they met again in the dungeon, he told her that what she loved was her name, and she realized that he had taken the blame to protect her. Seven days and seven deaths, she stabbed him with her sword, and he smiled and said: You finally recognized me.