Amidst the darkness of the Warsaw Ghetto, Irena Stanislawa Sendler, a Polish social worker and nurse emerged as a beacon of hope. Operating through a secret network, Sendler rescued more than 2,000 Jewish children from its confines. Despite arrest, torture, and a looming death sentence, she remained steadfast, never revealing their whereabouts. Historian Ralph Nurnberger sheds light on the extraordinary bravery of Sendler, who risked everything to save the children of the ghetto.