Xu Nannan can understand animal speech. She helps her father, Xu Jianguo, run a failing zoo, rescuing a timid Northeast tiger named Zhaocai, a black bear refusing to eat named Dafu, an elephant with a foot injury named Dagui, and others. Father and daughter insist on animal welfare, refuse performances and feeding by visitors, strictly control feed quality, and promote science education cooperation, ultimately bringing the zoo back to life. The story showcases the positive values of kindness, responsibility, and respect for animals.