Here Come the Littles

Henry Bigg, whose parents are lost in Africa, lives with his greedy and heartless Uncle Augustus. In the walls of the house, Henry befriends Tom and Lucy Little, a family of miniature people. As they team up to prevent Augustus' plan to build a shopping center at the site of their home, they discover evidence of Augustus' fraud and ultimately outsmart him, leading to his arrest and the saving of the Biggs' property.