After Qiao Haitang dies, she transmigrates to a Western fantasy world, where she starts out as a skeleton and becomes bound to a cheat system. The system helps her rebuild her body, teaches her magic, and intends to cultivate her into the world's most powerful witch. However, Qiao Haitang only wants to retire peacefully and open a restaurant to promote Chinese cuisine. The system is anything but legitimate: it is a corrupted system that operates on the edge of the rules, named "Fight! Fight! Fight! Kill! Kill! Kill!", whose goal is to plunder the lifespans of all living things and ascend to become the ruler of the world. The system encourages her to abduct people and steal their lifespans, but Qiao Haitang timidly admits that it has mistaken her for someone else. It thought she was a murderous criminal from an island prison, when in fact she was an undercover police officer. The system falls silent on the spot.