Li Mao plays the role of a prince.

The film tells the story of a young policeman, Li Mao, and a prince. Because of their similar looks, the young policeman Li Mao wants to be an official in the court, and the prince wants to be free. After exchanging identities, they fell into the trap of Shangshu, so they fought with Shangshu.

Although the little catcher Li Mao married a rich girl Yang, they lived a happy life. But Li Mao always wanted to work for the imperial court and be an official. But it's still too difficult for a small catcher.

And the prince's words, although the palace is luxurious, but there is no freedom, so when Li Mao saw the prince, he found that they have the same appearance. In order to realize their respective wishes, the two men exchanged identities, and the prince became a little Li Mao, and Li Mao's character became a prince.

What Li Mao didn't expect, however, was that all this was a trick of Shangshu. When they found out that Shangshu wanted to frame the prince, Li Mao began to oppose Shangshu. In order to protect himself and the prince, Li Mao saw through the plan of Shangshu in the period of the prince and made it public. After Shangshu was brought to justice, Li Mao also started a new life. ?