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California couple Peter (Christopher Denham) and Lorna (Nicole Vicius) set out to make a documentary meant to expose a charismatic cult leader named Maggie (Brit Marling) as a fraud. Maggie claims to be from the year 2054 and is seemingly allergic to almost everything in her environment; she lives in a basement, subsisting on canned oxygen, homegrown food and the blood of her acolytes. Though at first, Peter and Lorna are adamant that Maggie is a fake, they both soon fall under her spell. Wikipedia