Stow the Dungeons & Dragons gear, pal, this is not a tale of merry olde England. Here the privileged Polley is on her way to Harvard Law School when she meets a mangy old shutterbug (Rea) who dubs her Guinevere. There's dysfunction at home and uncertainty about the future, so pretty Polley moves into Rea's studio, where they find bliss for a while. Her parents find out and things begin to fall apart.
As the bullying mom, Smart is worthy of an Oscar nod, and Polley's delicate demeanor is the perfect hook to hang this taut picture on. That's why it's a real disappointment when the film's conclusion unfurls so limply.