Bernard and Miss Bianca, two mice who are members of the Rescue Aid Society, attempt to rescue an orphan named Penny from the evil Madame Medusa, who's after the world's biggest diamond. They are aided by comic sidekick, Orville the albatross, and a group of lovable swamp creatures. Very charming in the best Disney tradition. Based on the stories of Margery Sharp. Followed by "The Rescuers Down Under."