Girls from Jingmu Girls' School disappear one after another, and the heavy fall of a hammer opens the prelude to a revenge case. The bodies of girls who participated in the bullying are found one after another, and the mute girl Xiaotong who was bullied is missing during the school celebration ceremony. The peeping boy, the gossipy landlord, the silent husband, the neighbor who never showed up... Li Han decided to find his daughter and find out the truth himself.