A puppy comes home from school and it is raining too hard for him to go out and play, or even for his friends to come over. He wonders what he can do, and suddenly his imagination comes to the rescue. A triangular stair in his house is magically transformed into a pier, a campsite, a tree house, a rocket ship, and finally a theater. The whimsical drawings and humor in this book appeal to adults as well as children.