Scholar Zhang Zhen originally had a marriage contract to marry the prime minister's daughter Mudan. It's a pity that Zhang Zhen could only go to the prime minister's house to stay overnight because his parents passed away one after another. The prime minister's daughter naturally looked down on such a poor scholar, so she ordered him to live next to the thatched hut in the back garden to prepare for the exam, and divorced him. Zhang Zhen was very unhappy, and often went to the lake at night to lament her fate. A carp spirit felt sorry for him, and felt pity for him. He turned into a human and played with him in the back garden, talking with him.
Suddenly one day, the real peony came to the back garden and met chasing fish, The two had a dispute. So Zhang Zhen and Zhui Yu escaped from the Prime Minister's Mansion. The prime minister was still angry, so he invited heavenly soldiers and generals to capture the carp essence. Zhang Zhen died tragically in order to save Zhuiyu. The carp essence was also collected and suppressed under the magic weapon of the celestial master. Fortunately, Guanyin suddenly appeared, and she wanted to take carp to the South China Sea to practice immortality, but Zhuiyu chose to revive Zhang Zhen. She is willing to abandon her thousand-year-old practice to be with Zhang Zhen.