When Granny dies, a young child and their family have a hole in their hearts. They find it helps them fill it to remember her through the things she left behind. To the father, she left a tuba, and to the mother, a locket. To the sister, she left a microscope, and to the brother, a record collection. To the main character, though, Granny left something different: a world of adventure, that they visit with their memories.