Two childhood friends decide to enlist in Rio de Janeiro’s Military Police Department. After juggling their police jobs and college, both make up their minds to try out for a Special Operations Squad whose mission is to take down the drug-lords that plague the city. Both men struggle to survive, facing the daily challenges of dealing with pressure at home and fighting an unnamed war on the streets.

A “National Geographic” crew heads down the Amazon in a jungle boat to make a documentary on a long-lost tribe of natives. En route, they rescue a hunter from his sinking boat and take him on board. After the ship’s captain is attacked by a poisonous insect and goes comatose, the hunter commandeers the boat, takes the crew hostage, and drags them along on his insane quest to capture a giant anaconda.