Deep within the forests of WW2 Poland, Lithuania, Belarus, and Ukraine, more than 25,000 Jews fought back against the Nazis. Often based in mere holes in the ground and armed with whatever weapons they had, Jewish men and women fought, against the Nazi war machine. The Jewish Partisans executed tactical missions blowing up trains, bridges, police stations, and telegraph lines. By 1944, Jewish Partisan vigilance had made the forests so dangerous that Nazi soldiers were afraid to enter. Four Winters shines a light on the last surviving partisans who tell their stories through interviews, archival footage, and historic war records.