The Fox Searchlight thriller The Eastdirected by Zal Batmanglij and co-written by Batmanglij and Brit Marling, who also stars, debuted yesterday at Sundance. The film centers on a mysterious anarchist collective (called The East) and an ex-FBI agent (Marling) who goes undercover and dedicates herself to taking it down. Ellen Page and Alexander Skarsgard also star. Check out the trailer below:

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