An undercover investigator's moral compass begins to change when she infiltrates an anarchist group responsible for targeting major corporations. When the CEOs of high profile companies find themselves the victims of a number of covert attacks, former FBI agent Sarah Moss (Brit Marling) is recruited by private intelligence firm Hiller Brood to gather information on 'The East', a shadowy eco-activist collective thought to be responsible. After finally managing to infiltrate the group, however, Sarah discovers her allegiances beginning to shift, as she increasingly begins to question the moral uncertainties of her life and finds herself falling under the spell of the group's charismatic leader Benji (Alexander Skarsgård).