The People Under the Stairs (1991)

The People Under the Stairs is the story of a young boy (Fool) from the ghetto and takes place on his 13th birthday. In an attempted burglary (along with two others) of the home of his family's evil landlords, he becomes trapped inside their large suburban house and discovers the secret of the "children" that the insane brother and sister have been "rearing" under the stairs.