The "one thing" that prompts 13 different conversations is happiness, and in this drama from writer-director Jill Sprecher, a superb cast (including John Turturro, Amy Irving, Matthew McConaughey, Clea DuVall and Alan Arkin) circles all the big questions about happiness, how to find it and how to hold onto it. The characters' stories meld in a gorgeously shot and inventively edited style that creates a breathtaking sense of heightened realism.