Part One: This 2-part series follows River Hagg as he travels to war-torn Syria, in hopes of documenting stories of the worst humanitarian crisis since WWII. He finds a medical unit of foreign volunteers as they provide aid to civilians, YPG fighters and ISIS. Part two: The volunteers continue to push with the YPG to the ISIS defended city of Manbij, Syria. River hears news from home and plans his exit. The team is granted access to the front lines and they find themselves on dangerous ground, surrounded by ISIS.