 September, 1944. It s the 56th day of Warsaw s uprising against the Nazis. The third Platoon of the Resistance is down to 43 heroic men and women, and they re penned in. After a last day of fighting, and of good-byes to family, to love making, and to music, a handful of doomed survivors wade into the city s underground sewers in hopes of escape. Their valor is tested a final time.