The East, Ellen Page, Alexander Skarsgard

Cults, rituals and underground movements were explored in Zal Batmanglij's unjustly overlooked "Sound Of My Voice," and this year he returns to the Sundance Film Festival with collaborator Brit Marling for "The East," another picture exploring those similar themes. And following its premiere in Park City over the weekend, Fox Searchlight is using the buzz to drop the first teaser trailer for what looks like an equally gripping experience.

Starring Marling, Ellen Page, Alexander Skarsgard and Patricia Clarkson, the film centers on a young woman who works for a private intelligence firm who is tasked with infiltrating an anarchist collective. And once she does, she soon finds herself in over her head, and caught up in their campaigns and covert operations, and begins to question her own motives. Our review out of Sundance called it a "stylish thriller" that also serves as "a terrific companion piece for anyone who enjoyed 'Sound Of My Voice.'" This teaser doesn't give too much away, but sets everything up for what looks like a pretty white knuckle little ride.

No release date yet, but "The East" is expected to hit theaters later this year. 

The East Poster