Zhang Yimeng, who lives in the present day, is convinced that she is a princess who has travelled from the ancient state of Xi, and she tries by all means to return to the past. An unexpected faint brings her back to the ancient state, where everything feels familiar yet strange.

Hua Rong, daughter of a general, accidentally becomes the wife of the pirate king Qin Shangcheng. However on the night of their wedding Hua Luo escaped. Qin Shangcheng is determined to hunt her down.

During the Northern Wei Dynasty, Mulan joined the army for his father and returned with honor. Ten years later, Rouran broke the border again, and Mulan resolutely returned to the battlefield. To save Tuoba, Mulan fell into the enemy. In prison, Mulan saw through Kunpeng's tricks. Kunpeng killed Khan and blamed Mulan. Mulan battled Kunpeng to protect innocent people. The princess pointed out that the real murderer was Kunpeng. Kunpeng was killed in the melee. The chaos subsided. This film celebrates peace and national harmony, and shows that Mulan, as a woman, does not abandon her compatriots, does not abandon her country, and constantly strives for the outstanding quality and family feelings.