Mikhael is a sergeant in charge of BOPE, always on dangerous missions in Rio de Janeiro. But after getting involved in a controversial operation that culminated to a slaughter, he is transferred to a police unit at the state countryside.

In 1997, Rio de Janeiro was shaken by a wave of kidnappings. Security forces call controversial agents to help save the city from thugs and also from the police itself.

Três amigos fundam a Aruana, uma ONG que investiga as atividades de uma empresa de mineração na floresta amazônica. Os ativistas, cada um seguindo suas próprias pesquisas, encontraram muitas evidências que revelam crimes ambientais.