Based on a well known polish novel with the same title the movie re tells a true life story of a group of scouts called ''szare szeregi'' gray ranks during the nazi occupation of warsaw and the liberation of one of its members imprisoned and tortured by the germans through a maverick military action in board daylight right under the enemy's nose known ''action at the arsenal'' which was the biggest single feat of the sort undertaken by a youth resistance organisation in all of occupied europe during wwii. Running time 107 minutes region region 2 subtitles english release date 10 aug. 2015