After a car accident, Xin Yueying transmigrates into a novel she once read, becoming Xin Siniang, the vicious supporting character who has just been caught poisoning Shen Qingqi red-handed. From the very beginning, she finds herself trapped in a seemingly unavoidable death sentence. Thinking quickly, she lies that an outsider forced her to administer the poison, then devises a scheme to lure in the butcher Wang and eliminate him, temporarily clearing herself of suspicion. Afterwards, she puts her practical skills to use by making household conveniences and tries to find a way to survive by staying close to Shen Qingqi.