Superstar Cheng Hao exchanges his identity with his alter ego in a parallel universe Lu Hongjian, a no-name internet novelist. He becomes involved with journalist Lin Xiaoxiao who is Cheng Hao’s crazy fan.

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.