On a small island in the middle of the sea, a mouse named Milo makes an extraordinary discovery - a magic, glowing stone hidden in a deep crevice. How will this discovery change the lives of Milo and the other mice? Will it bring delight or disaster? The reader must decide. Halfway through the story, the book splits into two sections, each offering a different ending. A thought-provoking story showing how the decisions we make about the environment today can help determine the future of our planet.