Hunting ISIS is a character-driven documentary series about independent fighters from the west joining the fight against ISIS in Syria and Iraq. The series follows the characters' interwoven journeys as the war against ISIS advances from 2015 through the Mosul Offensive in 2016 and the actual progression of the war and events unfolding on the ground. These volunteers have many reasons for joining the fight. Some are military veterans craving the familiar adrenaline rush and brotherhood of combat, who shoulder a sense of unfinished business in the Middle East. Some are civilians eager to test their mettle while searching for a greater purpose. With unprecedented access, this documentary series witnesses their unique role in one of the defining conflicts of our time, exploring what’s driving these men to war.