Claustrophobic and searing, In Darkness is based on a true story that occurred in Lvov, Poland, during the Nazi occupation. Leopold Socha, a sewer worker and petty thief, encounters a group of Jews trying to escape the liquidation of the ghetto. He hides them for money in the labyrinth of the town’s sewers, beneath the bustling activity of the city above. Holland and her cast and crew, who illuminated the sewer scenes almost entirely by flashlight, create an underground world that is dank, tactile, oppressive, and a hair’s breadth from the imminent dangers of the world above ground.