Liu Wenwu arrives at a police station where there are no earth-shattering cases, only the little things that happen around us. For anyone involved, these little things can be an unbearable burden. There's Dashu, hot-tempered despite being adored by everyone; Lao Zhou, a seasoned veteran who still has fire in his belly; the lovely Li Ling; Daliu, who has grown from a young man into an old one; the elusive chief; and old Xue and the others, who work diligently behind the scenes. They are always at their posts, rushing out as soon as a call comes in to handle the strange creature in the dead of night, the embroidery needle incident, the nanny who stole a child after 26 years, psychological abuse through PUA, a murder on a tactile paving path, domestic violence, and all kinds of incidents that happen around us. The people on this beat all have their flaws, more or less, but they do their best to protect their community.
As young Liu learns the ropes by following the officers on their investigations, the mysteries surrounding him are gradually unraveled. But no one knows whether he can forgive himself.