It's September 1, 1944 in Nazi-occupied Warsaw, five years into World War II.

Teresa Vilska, a young female liaison officer with a Polish home army, leads a group of 50

men through the Labyrinthine sewage system running beneath the city.

Teresa is in charge of taking them across town to a rendezvous point where the Polish army needs back up.

It's also her job to keep them orderly and silent, which is no easy feat.

Many of the men in the tunnels are not trained soldiers. The majority are simply civilians who

see now as the moment to rise up against their German occupiers. They struggle to keep their

cool in the underground. Frightened by the eerie silence of their strange new surroundings,

some begin to raise their voices. One switches on a flashlight to race of flinches.

She knows the smallest of sounds. The briefest of lights will alert the German soldiers above,

and if found, they'll pay with their lives.

Teresa silences the soldiers around her, but some brush off her warnings and continue their

nervous conversation. Teresa grabs one man by the collar and tells him she'll shoot him dead

if he makes another sound. The threat is a bluff. She isn't even armed, but the soldiers don't know

that. The men finally fall silent and just in time. Above them is an open manhole guarded by two

German soldiers. Teresa holds her breath as she silently shuffles through the tunnel and the

others follow suit. Finally, they've made it past the soldiers, but the journey is not even half

over. The walls around them shake as bombs drop from German planes overhead. Just one could bring

the entire tunnel system crashing down, but Teresa can't think like that. She has a job to do.

So they trudge on, until Teresa spots another open manhole. This time she breathes a sigh of relief,

realizing they've reached their destination. She motioned for the men to start climbing the

ladder leading up to the opening, and one by one, they're pulled up from the sewers by fellow

...