Xiaofan and his pet Dahei accidentally traveled to the world of immortality, but were forgotten by time. However, they became immortal, and their bodies became more and more powerful as time went by. However, they were cursed by heaven and had extremely bad luck and were unable to practice. For this reason, one man and one dog embarked on the path of seeking Taoism, but unexpectedly found that luck could help them practice. So wherever there is a son (daughter) of luck, there is a man and a dog.