When young Lucy travels from Latin America to visit relatives in Ohio, she is very homesick until she realizes that the only way to communicate with her cousin's frisky dog is to learn to speak English.

When A, E, I, O, and U jump off the page, reader Sue MacDonald pursues the renegade vowels.

Pepita, a little girl who speaks Spanish and English, grows tired of having to translate for all her Spanish-speaking friends and relatives and decides she will no longer speak Spanish, but she fails to think of all the complications it will cause, especially when it comes to trying to train her dog Lobo, who refuses to answer to the name Wolf.