In the Tianshan Forest Farm in Northwest China, forest guard Zhu Guangsheng domesticated fierce wolf dogs to prevent poaching and poaching. A stray puppy accidentally walked into Lao Zhu's life. Lao Zhu named it "Lan Bo" and began to train it to be a forest dog. Lan Bo, who is extremely human, quickly became Lao Zhu's good helper. Zhang Biao, who was imprisoned because Lao Zhu reported him poaching wild wolves, was released after serving his sentence. He began to seek revenge from Lao Zhu and constantly threatened the safety of Lao Zhu's two daughters and Lan Bo. Dissolved by the witty Lan Bo, Zhang Biao jumps over the wall and leads someone to snatch Lan Bo away forcibly. Lao Zhu and Director Liu of the police station find Zhang Biao and see a pot of dog meat on the table.