Sergeant Rick Pedroni comes home to his wife Kate changed and dangerous after suffering an attack by a mysterious force during combat in Afghanistan.

On the last working day of Sheriff Wayne, his small town is attacked by blood thirsty ravens that eat human flesh. Meanwhile his wife Cynthia visits a farm where a Mennonite family lives to say farewell to her friend Gretchen and discloses a dark secret about the origin of the fierce ravens.