Zhou Yu'an, a demonic cultivator in the realm of cultivation, was cornered by the righteous path and accidentally bound by a system originally searching for the son of luck. To escape danger, he carried a remnant soul and transmigrated into different small worlds, taking on the task of being a good person and accumulating merit. From a modern chaebol to an ancient prince, and then to an ordinary worker, he accepted the original hosts' fates in various identities and families, using decisive means to counter plots, protect relatives, and change one originally tragic life after another. The contrast between the cold demonic cultivator and the good person task runs through multiple generations of counterattacks and human emotional ties.