Underwater Dreams, written and directed by Mary Mazzio and narrated by Michael Peña, is an epic story of how the sons of undocumented Mexican immigrants learned to build an underwater robot from Home Depot parts and defeated engineering powerhouse MIT. Two energetic high school science teachers, on a whim, decided to enter their school, where most of the students live in poverty, into a sophisticated underwater robotics competition sponsored by NASA and the Office of Naval Research. Only four students signed up for the competition, but once assembled, with enthusiasm and verve and little money, they built a robot from the parts they acquired at Home Depot and headed for Massachusetts in a beat-up van.