Xiaoxian's life falls apart when she discovers her boyfriend is cheating on her with her best friend. Heartbroken, she struggles to move on, but her tough co-worker Jian steps in with a tough-love approach to help her heal.

Five Chinese young people go for an outing, encountering a little girl blocking the road for help. To save the girl, they got into a chemical factory and got involved in a catastrophe of mutant rats attacking human beings.