Heidi It (Talitha Bateman) is a twelve-year-old girl with a mentally disabled mother, but she is otherwise extremely lucky — she has a knack for heading in the right direction. Heidi has no information about her family or origin; she and her mother have been taken care of by their agoraphobic next-door neighbor Bernadette since the moment they appeared on her doorstep when Heidi was a week old. The only clue is a new word in her mother's drastically restricted vocabulary: "soof," which Heidi assumes holds some meaning she longs to uncover.
Then Heidi discovers an old disposable camera, which raises even more questions about her mother's past. She travels alone by bus from Reno, Nevada to Liberty, New York to visit the group home in the photographs and probe its tight-lipped manager for answers. She is assisted by strangers she meets on the way, and all the while she ponders the nature of truth, whether it is always knowable, and whether it is always worth knowing.
Based on the New York Times Best-selling novel, this movie is both charming and bittersweet, and handles difficult topics with understanding and respect.