You've got to hand it to Brit Marling when it comes to audacious premises, both in Another Earth (in which she starred and co-wrote with director Mike Cahill), and in this high concept sci-fi head-scratcher, in which she also stars and co-wrote with director Zal Batmanglij. The execution, though, needs a little work, especially down the home stretch when the dénouement unravels into pseudo-enigmatic folderol. Marling plays Maggie, the sylph-like leader of a cult who claims to be a messenger from a catastrophic future. Fledgling filmmaker Peter (Christopher Denham) and his colleague and girlfriend Lorna (Nicole Vicius) infiltrate the cabal in order to shoot a documentary exposé that they hope will make their careers. But who can resist the power of Maggie's golden locks and seductive abuse? Broken into numerous brief, sometimes elliptical but mostly perfunctory chapters, Voice is reminiscent of 12 Monkeys and Terminator, except those films kind of made sense.