A new documentary tells the story of Nicholas Winton, a British stockbroker who saved the lives of 669 Czechoslovakian children through the Kindertransport in 1939. Audiences in Los Angeles have a unique opportunity to see the film and meet Dave Lux, one of the children he saved, this Sunday.

Dave Lux survived the Holocaust as a child because of Nicholas Winton, who orchestrated the Czech Kindertransport, saving hundreds of Jewish children by transporting them to England. Lux remembers leaving his parents and thinking he’s going on a field trip.