Single father Lin An is trapped on his daughter's fourth birthday, constantly experiencing car accidents and restarts. In the endless repetition of time, he discovered that his cute daughter Nuannuan was actually a "little koi" who said whatever she wanted - she made a wish casually, and good things would happen. Lin An took advantage of the reincarnation and his daughter's luck to become a perfect father from a novice in parenting, but he was still unable to break the reincarnation. It wasn't until his daughter pointed to the park bench and said, "Mom cried here," that he was shocked to realize that the key to solving the problem was actually closely connected with the child's mother who had disappeared for five years, and an ancient secret about "talent" and "price." When the final moment of the cycle comes, he must make a choice: be satisfied with the eternal "perfect day", or risk everything to fight for a real future for his daughter tomorrow?