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."