A brown bear in the zoo escaped from prison. The keeper Shen Nian encountered a brown bear knocking on the door at home. He witnessed the brown bear maiming his neighbor but was unable to save him. The director of the zoo was killed because he blindly protected the bear and led his men to arrest him. The brown bear has a very high IQ and can open doors and set traps. Shen Nian narrowly escaped being killed many times and went through many dangerous situations. Finally, when the police arrived, the brown bear was shot dead on the spot. But later, it was discovered that there was another brown bear whose whereabouts were unknown, and it came to Shen Nian again with its cub.
