This video tells the story of a little mouse named Milly. In the house where she lives, there's a new pet cat: Coco. When Milly looks out of her little mousehole, she always sees Coco eating, and Milly knows that cats eat little mice. Poor Milly is terrified that Coco will eat her. What she doesn't expect is that the two of them might become friends. Based on the children's book by Alex MacDonald.