Shen Linjing, a highly talented police academy student with a bright future, took the initiative to apply to return to her hometown for internship. Her hometown is on the ancient and mysterious Sumo River. During her internship, she encountered all kinds of people and things that were puzzling to her: Mick Miao, a girl with bipolar disorder and her monkey; Shen Linjing, who lost her left leg in an accident when she was young; women hiding in the hospital; the eyes of the police station director full of stories...