When Su Mu reached middle age, his marriage broke up and his life hit rock bottom. Unexpectedly, after the divorce, the youthful and frivolous system was accidentally activated. Faced with a son who was helpless after a breakup, and a daughter who was so rebellious that she didn't want to recognize her father, Su Mu no longer talked about the truth, but re-entered the scene as a young man. Not only did his body gradually return to the peak state of his twenties, but he also quietly narrowed the distance between him and his children through ridiculous interactions. And all this also made the ex-wife break her guard frequently and start to re-examine the new ex-husband before her.