- After his owner, Lin Feng, leaves for work, the golden retriever Doudou wanders around the residential complex alone, enjoying his free time. His inner monologue reveals his deep affection for his owner and his philosophy of life as a dog.
- Jia Qilin, a spoiled rich kid, races through the complex with his rowdy friends and nearly hits Doudou. Instead of apologizing, he gets angry and jumps out to chase and beat him.
- Driven into a corner, Doudou is kicked and beaten. A strange bolt of lightning strikes, knocking both Jia Qilin and Doudou unconscious.
- When Doudou wakes up, he finds himself trapped in a human body, while Jia Qilin's soul has entered a dog's body.
- The Owner Recognition System activates and issues its first task: "Find your owner and get him to take you in."
