The Miracle of P. Tinto

Wafer factory-owner P. Tinto and his wife Olivia want a their own child more than anything else in the world, but after years of trying, they have nothing but a pair of extraterrestrial midgets living in their spare bedroom. When they decide to try adoption, a series of misroutings and chance encounters results in an escaped adult mental patient arriving at their door with adoption papers in hand. P. Tinto and Olivia accept this without question and welcome him in as their son. Can this family arrangement work?