It’s hard to argue Director Werner Herzog isn’t being true to the themes defining his peculiar brand of cinema: obsessive characters chasing impossible dreams, hostile natural landscapes and a persistent blurring of truth and fiction. Herzog’s Bucking Fastard (C+) checks all three boxes and still qualifies as a double head-scratcher. Real-life sisters Kate Mara and Rooney Mara, both extremely game for an unusual assignment, play twins who speak, move and even dream in unison while pursuing their eccentric conception of love and belonging. Their extraordinary bond inspires fascination as their shared obsessions range from an unrequited love affair with Orlando Bloom to the seemingly impossible task of digging a tunnel through a countryside mountain. Herzog finds strange beauty and flashes of humor in their singular existence, and the Maras commit so completely that the sisters never become mere caricatures. Yet for all the film’s intriguing eccentricity, it remains frustratingly opaque about what motivates these women, why their obsessions consume them or what Herzog ultimately wants us to understand about their extraordinary bond. Bucking Fastard is unquestionably an original curiosity, but being fascinated by its characters isn’t quite the same as being invested in them.