Four young Polish Jews, standing in line at Auschwitz to receive consecutively numbered tattoos on their forearms. Two are brothers. The other two are strangers. They become separated. All four survive the camp and the war and settle in Israel at the end of WWII.
Fast forward 65 years and read the story here of how the four find each other and meet for the first time since Auschwitz. (The two brothers may have been in touch with each other, but the two strangers met each other for the first time this year.)