Marriage, sexual ambiguity and the muted foxiness of the band's drummer have been the subtext of every White Stripes album. So it's no surprise that Emmett Malloy's documentary boils down to a scene in which the duo shares a piano bench, and silent tears run down Meg White's face while Jack White plays "White Moon" to an otherwise empty room. On a 2007 Canadian arena tour, with daytime stops for shows at a YMCA day camp in Toronto and a bowling alley in Saskatoon, the director ends up cataloging all the ways two people can be lonely. Meg speaks so sparingly and softly that she gets her own subtitles. For his part, Jack works it out onstage, in some of the most subtly shot and well-recorded concert footage ever from a band not named the Rolling Stones.