Day 165 examines the unexplained events that soldiers experience during their 165th day of service. Private Donnie Smith is a paratrooper in the British Army and has experienced the horrors of war. Donnie has kept his cool and sanity due to his beloved comics, especially Colonel Joe Monroe and his Freedom Brigade and it's a dream of Donnie's to one day be a great soldier like him. Sgt. Freddie Hayes doesn't share Donnie's love of comics and wants him to break free of his childish fantasies to become a true soldier. Now swept into a horrific mission in France, they must work together to destroy enemies old and new.