Devoted to making lists about everything in his life, Wallace the mouse discovers the joys of spontaniety and adventure when he becomes friends with his neighbor Albert.

A reckless young mouse named Ralph makes friends with a boy in room 215 of the Mountain View Inn and discovers the joys of motorcycling.

Having no one to help her with her problems, a widowed mouse visits the rats whose former imprisonment in a laboratory made them wise and long lived. Mrs. Frisby, a widowed mouse with four small children, is faced with a terrible problem. She must move her family to their summer quarters immediately, or face almost certain death. But her youngest son, Timothy, lies ill with pneumonia and must not be moved. Fortunately, she encounters the rats of NIMH,...