Have you watched Hiding Place?
It is the story about sisters Corrie and Betsie, who spent 10 months in three different prisons, the last being the infamous Ravensbruck concentration camp located near Berlin, Germany. Life in the camp was almost unbearable, but Corrie and Betsie spent their time sharing Jesus' love with their fellow prisoners.
http://www.imdb.com/title/tt0073109/
Read more about Corrie and the ten Boom family at the http://jerusalemprayerteam.org