In the troubled times of war and strife, 6-year-old Xiao Yue followed her master, a gluttonous master who called himself "Nanshan Old Man", to the Northern Dynasty Palace. The Nanshan Old Man left his young apprentice to look for the royal kitchen on his own. The quirky little girl met the 12-year-old Northern Dynasty Crown Prince Liu Yu for the first time. After spending 7 days with Liu Yu, the old man finally came. Xiao Yue said goodbye to Liu Yu and promised him to come back to see him when she grows older.
Later, the palace of the Northern Dynasties was destroyed by a fire, and the emperor died. Prince Liu Yu was "taken" to Jingzhou by the chariot general Li Pu. Later, Jingzhou was captured by the Turks, and Liu Yu was kidnapped to Jiangzhou by Zhao Sicheng, the governor of Jiangzhou. The heroes of the separatist regime all wanted to threaten the emperor and order the princes, and they went around all the way. Ten years later, Liu Yu was taken back to Luoyang by Taiwei Sima Xun, who had already held the power of the world. Almost unified, he waited for an opportunity to usurp power. He didn't want Liu Yu but escaped from the Northern Dynasty with Xiao Yue's help and went south... The days in Jiangnan were the most relaxed and happy days for the two of them. It turned out that Liu Yu had long been prepared to escape and return to the country. He secretly had a huge industry in Jiangnan. When everything was fine, was Liu Yu willing to leave the country and live a peaceful life with Xiao Yue?