A lawless poacher wants to capture a majestic and rare golden eagle, so he kidnaps the boy who knows where to find the bird. Not to worry -- the Rescue Aid Society's top agents, heroic mice Miss Bianca and Bernard, fly to Australia to save the day. Accompanying the fearless duo are bumbling albatross Wilbur and local field operative Jake the Kangaroo Rat.
What can two little mice possibly do to save an orphan girl who's fallen into evil hands? With a little cooperation and faith in oneself, anything is possible! As members of the mouse-run International Rescue Aid Society, Bernard and Miss Bianca respond to orphan Penny's call for help. The two mice search for clues with the help of an old cat named Rufus.
In Victorian London, young Adelaide is born into luxury, but marries starving artist Henry. His alcoholism and their lack of money lead to many quarrels. During one such fight, Henry slips down a flight of stairs and dies. A neighbor, Mrs. Mounsey, is the only witness, and she blackmails the young widow by threatening to tell the cops that Adelaide killed her husband. Luckily, lawyer Gilbert swoops in to help Adelaide.
Julia and William were married and soon separated by his snobbish family. They meet again many years later, when their daughter he has raised invites her mother to her wedding, with the disapproval of William's mother.