A civil war breaks out in the state of Qi when a feudal lord assassinates the king and seizes the throne. Harbouring the crown prince, General Xia Yunlong and his sister Yunxiang flee to seek refuge at the house of his fiancee, Caifeng. Caifeng is the daughter of Marshal Hoe, who guards the Zhaohe Pass of the state of Wei and from whom Yunlong requests an army to help the crown prince regain the throne. The usurper of Qi orders the arrest of the crown prince. The king of Wei also orders the arrest and questioning of anybody suspicious to curry favor with the new head of Qi. Caifeng promises to help but her brother Feihu insists on obeying the king’s order. However, the widower Feihu is impressed by Yunxiang’s beauty, and proposes to the guest; Yunxiang accepts his marriage proposal. The matter is now settled. They wait for Marshal Hoe’s return and his decision to deploy troops.
After several months of waiting for the Marshal’s return, Yunlong loses patience and makes Caifeng issue the Marshal’s “Tiger” mandate for troop deployment. Yunxiang procures the key to the arsenal. Yunlongleads the troops northward to Qi; they plow through all obstacles in their path. Yunlong is about to accomplish his goal when the king of Wei orders Hoe to revoke the authorization and withdraw the troops. The king forces the latter by threatening Marshal Hoe and his entire family with grave punishment if they do not comply. Yunlong refuses to obey and kills those in the troops who oppose him. WhenYunlong arrives in the capital of Qi, he finds a dire situation—his own mother has been taken hostage in addition to MarshalHoe's. After Yunlong’s mother sacrifices her own life, he leads the troops into the capital and quells the rebellion. After the victory, the crown prince of Qi grants the king of Wei eighteen cities as compensation for the trouble Hoe and Yunlong caused.