Bear and Little Bird find a baby fish in their pond and decide to keep her for a pet, but when she starts to sprout wings, or maybe paws, each thinks the fish wants to be like him, which puts a strain on their friendship.
Overseeing a "zoo-brary" that lends out all types of animals, librarian Miss Perkins discovers that the tiger has gone missing, a disappearance that triggers a citywide search alongside a new friend.