Grace's aunt is a writer. She works with words every day and teaches Grace interesting words like "melancholy" and "delirious." But Lily is often "flummoxed" by her writing. Her stories don't go anywhere, her desk is a mess, and her writer's group can't help. So Lily posts an ad for an assistant: A writer of books needs an assistant, a coach, a helper, for inspiration and some magic! The next day, Grace opens the door, and there is Rex: a Labrador retriever who will change Grace's life, and Lily's. The word "amazing" is an everyday word for Rex, who inspires Lily, and helps Grace find the words to write her own story.