19-year-old Ester Wajcblum and her 14-year-old sister Hana arrived at Auschwitz in spring of 1943. They were assigned to work in the munitions factory where they met Regina Safirsztain and Ala Gertner, women engaged in resistance activities. Together with Roza Robota, who worked in the clothes depot, they began to smuggle gunpowder to the men in the adjoining camp, sometimes using bodies of friends that were en route to the Sonderkommando for disposal.
The Sonderkommando were Jewish prisoners who worked the death camps in return for special treatment and privileges. Every few months, the current sonderkommando was liquidated and the first task of their successors was to dispose of the bodies of the previous group. Since a sonderkommando usually comprised men from incoming transports, their second task often consisted of disposing of the bodies of their own families. The sonderkommando did not participate in the actual killing -- that was carried out by the Nazis. The sonderkommando duties included guiding the new arrivals into the gas chambers, removing the bodies afterwards, shaving hair, removing teeth, sorting through possessions (much of which they were given as reward), cremating the bodies, and disposing of the ashes. Their knowledge of the internal workings of the camp marked them for certain death. Someone selected for the sonderkommando had a choice: die then or die in four months time.