Fu Sang is an "yin being" that coalesced from the resentment of dead people. A turn of fate, she got the chance to become human again. Tied to a trash system, the system tells her that she must raise the male lead and villain well, so that that they won't become enemies due to the female lead in the future. Only then will it be mission complete. But Fu Sang only has "resentment" in her eyes. Raising cubs = nourishing with pure resentment. Not bad! Thus, Fu Sang starts on the path of raising cubs, but discoveres things are not that simple