Dani is going on a school trip to the zoo, and the teacher tells the children how to stay safe and not get lost. But Dani gets separated from the others. Suddenly another class is rushing up to the path—and at the back of the noisy crowd is someone she recognizes: Ella! The good friends are so happy to be together again, and Ella wants to play. What should Dani do? Follow her best friend in the world or do as the teacher said? The first, of course!