To relieve the boredom of a long, hot summer, Mr. Putter and his cat Tabby join their fun-loving neighbor, Mrs. Teaberry, and her mischievous dog Zeke on an adventurous sightseeing boat cruise.
When Cousin Henry gets all the attention in the grown-up musical in which they have roles, Angelina becomes jealous, but she demonstrates her fondness for him when a crisis occurs on opening night.
Disliking her name as written in English, Korean-born Yoon, or "shining wisdom, " refers to herself as "cat, " "bird, " and "cupcake, " as a way to feel more comfortable in her new school and new country.