In 1944, during the Warsaw uprising against the Nazis, Polish Lieutenant Zadra and his resistance fighters use Warsaw's sewer system to escape the German encirclement.In 1944, during the Warsaw uprising against the Nazis, Polish Lieutenant Zadra and his resistance fighters use Warsaw's sewer system to escape the German encirclement.In 1944, during the Warsaw uprising against the Nazis, Polish Lieutenant Zadra and his resistance fighters use Warsaw's sewer system to escape the German encirclement.