When the wife of troubled FBI agent Flynn Carroll goes missing, the trail leads to a shadowy group of international terrorists known as Hunters. To find his wife, Flynn joins forces with the Exo-Terrorism Unit (ETU), a highly classified Homeland Security division charged with stopping the Hunters—terrorists who may not even be human.

A new lead sends the ETU team to a Hunter-run drug camp in the jungles of Colombia, while Regan struggles with her past