The "Prison Dog Program" is one of the most successful prisoner rebirth programs in the world. Inmates participating in the program need to train stray dogs to make them useful working dogs for society, so that they do not need to be humanely destroyed; inmates also learn a series of dog training skills from the program, and learn how to care for others and get along with people; and vulnerable groups such as lonely elderly people or disabled people who need dogs can get a loyal partner. It is a "win-win" warm program. Professional dog trainer Li Qiao (Hao Lei) returned to China to join the "Prison Dog Program". Cartoonist Qiu Shaodong (Liu Shuailiang), Internet fortune-teller Hou Dekun (Pei Kuishan) and Ma Jie (Han Yanbo) who has a dream of being a martial artist were selected to participate in the program. They need to save a group of stray dogs that are about to face humane destruction and make them professional companion dogs that can accompany vulnerable groups. The three will also learn love and dedication through the companionship and help of cute dogs in the "Prison Dog Program", and save themselves and return to society.