Single mother Li Yun, due to her impoverished family background in her youth, was deprived of her dream of studying fine arts. She pinned all her unfulfilled artistic pursuits on her daughter Tongtong. To "keep watch" over her daughter, Li Yun took a job in the cafeteria of Suihua Art School through an acquaintance, exercising comprehensive high-pressure control over Tongtong's studies, social life, and daily routine. Daughter Tongtong loves painting and has outstanding talent, yet she has long lived under her mother's negation and control. During a sketching class, Tongtong and male classmate Xia Bo were practicing figure sketching in the school corridor when they were bumped into by her mother, who mistook it for puppy love, thereby detonating the long-suppressed conflict between mother and daughter.