There are not many people who think zoo animals are happy, but here are some people who are dedicated to improving the happiness of the animals. They are veterinarians and zookeepers at the zoo. The film focuses on the zoo staffs who work at the Cheongju Zoo and deals with the life and death of the animals they care for. Their daily routine is filled with big and small tasks, including cleaning cages, breeding of endangered species, care and surgery, and determining emission and euthanasia. The film observes the back of the zoo, which is invisible to spectators, with a delicate and warm gaze. Despite the dedication of zoo staffs, zoo animals are not happy. For the wild animals who "do not give them a heart while meeting every day," they look for ways to send these animals back to nature. However, they have no option but to be left as animals on display because they can not survive in the wild and they are domesticated. In the latter half, when the archiving footage is presented about the life of the tiger 'Bakramee', who was born in the zoo and lived there for a lifetime, the film conveys a pathetic atmosphere. [KANG Sowon]