A little brown bat gets lost in the Sonora desert. While looking for insects to eat, he encounters some frightened humans who break one of his wings. He ends up in a bat hospital, where he meets a whole bunch of his cousins. He's surprised to find that some sip nectar, some eat fruit, and others enjoy insects or fish. He comes to realize that each group of bats is important in their ecosystem, as they help pollinate flowers, disperse seeds, and control disease. Then, he'll learn how relationships between bats and humans have evolved, helping young readers lose their fear of these extraordinary animals.