In the vast sea of people, when a happy person encounters a heartbreaking misfortune in his life based on happiness, such misfortune is like a thorn in the growth of others. Although it can't cut off his way forward, it can still make him unable to let go. If these need to be eradicated, he thought, maybe he only has the rest of his life to fight! The little bits of happiness that a sad person encounters in a life based on sadness are like these moments of beauty that he got after spending all his luck. If she needed to exchange them for anything, she thought, maybe the only thing left was the devastated life! The intertwining of luck and misfortune is an encounter that they cannot control, and it is also the deepest emotional dependence in their hearts that they cannot let go of. Two groups of unrelated people meet together, either accidentally or inevitably, and write a new chapter of their different destinies. Whether this is luck or misfortune, only they themselves know!