Police officer Dai Zhanshuo (Louis Koo) is careless and irresponsible, which makes the police dog Rocky despise him. The spiritual Rocky deliberately makes things difficult for Zhanshuo. Later, Rocky was seriously injured in an operation and could not work again. Zhanshuo couldn't bear it and decided to adopt Rocky. Shuozi's neighbor Awen (Jessica Hsuan) is also a dog lover, but he and Zhanshuo are incompatible. Awen believes that it is because of Rocky that his beloved dog Dongdong disappeared. The appearance of the stray dog Doudou comforted Awen's heart. But Rocky and Doudou soon fell in love, which made Zhanshuo and Awen, as the owners, very headache. Awen's friend Zishan (Sammi Cheng) is Zhanshuo's landlord. Because of Awen, the relationship between him and Zhanshuo is not very harmonious. But after Zishan lost her job and broke up, she was encouraged by Zhanshuo and they fell in love with each other unknowingly. At this time, Zhanshuo's boss Xiaomin (Shanshan Lee) also had a good impression of Zhanshuo, which made Zhanshuo very distressed. When Zhanshuo learned that his friend Tienan (played by Lin Xiaofeng) liked Xiaomin, he strongly encouraged Tienan to pursue her. Zishan is a career-oriented girl. Later, she broke up with Zhanshuo because of work. After Zishan left Hong Kong for further studies, Zhanshuo and Awen studied pets together and fell in love. When Zishan returned from school, Awen accidentally discovered that Zishan still had feelings for Zhanshuo. She felt that she had stolen her friend's boyfriend and was conflicted...