Grace's aunt Lily 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 own writing. Her stories don't go anywhere, her desk is a mess, and her writers group can't help. So Lily posts an ad for an assistant.The next day, Grace opens the door, and there is Rex: a Labrador Retriever who will change Grace's life, and Lily's.