Here's a summary from the official site:
Indie Game: The Movie is a feature documentary about video games, their creators and the craft. The film follows the dramatic journeys of indie game developers as they create their games, and as they release those works, and themselves, to the world.
Indie Game: The Movie is about making video games, but at its core, it’s about the creative process and exposing yourself through your work.
The film tells the emotional story of a two-man team, Edmund McMillen and Tommy Refenes, as they craft and release their first major game for XBOX, "Super Meat Boy". It follows Phil Fish, the creator of the highly- anticipated game, "Fez", as he shows it for the first time in 4 years at the giant gaming expo, PAX EAST. And, the film tells behind-the-scenes story an independent designer, Jonathan Blow, who made one of highest-rated video games of all-time, "Braid".
Four developers, three games, and one ultimate goal - to express one’s self through a video game.