After being reborn, Qiao Haitang becomes a skeleton with only half a body left in the Forest of Abandonment, and gets bound to a crazy system that spends all day urging her to harvest other people's lifespans. To survive, she opens a restaurant and raises a mysterious mermaid child, but unexpectedly gets caught up in a mystery involving the consecutive disappearances of young girls. Rumor has it that the Holy Grail, which can grant eternal youth and immortality, has also been lost deep within the forest, attracting various forces who secretly compete for it. Witches, demon hunters, elves, and monsters appear one after another, while danger lurks beneath the peaceful little town. She must conceal her identity and survive in this magical world where human lives are worth less than grass.