A cosmetics saleswoman specializing in beauty and skincare is inexplicably drawn into a murder case! It's early autumn, and Guo Na is working in her hometown as a beauty expert and cosmetics representative. Her business gets off to a promising start, until she discovers that one of her wealthy customers has been murdered by a knife-wielding maniac. When Officer Lin Zhihui takes charge of the case, Guo Na is sure he'll quickly bring the killer to justice. However, Lin Zhihui and his team soon realize that the killer is always two steps ahead. This "killer" terrorizes Guo Na's cat, wrecks her car, and spreads vile rumors that she's a call girl. Guo Na is ready to fight for her friends' lives, and for her own existence.