Photos and texts artistically frame the narrative of the painful journey of loss experienced by Renée Revach's family from Thessaloniki to Auschwitz. The only survivor was her grandfather, Albert Revach, who had escaped to Athens and waited for their return until the end of the war, preparing for their homecoming.

Renée Revach meets him in his moment of despair when she learns that his family had been wiped out, and she promises with her work Tehom (a biblical Hebrew word meaning the primordial deep) to lead him to the scene of the crime, which he never found the courage to visit until his death.

Two successive journeys of Revach will follow to the Birkenau and Auschwitz camps. At every step of her journey, she mentally addresses her grandfather, sending him photos and sharing her thoughts and feelings with him. Her narrative stems from an intermediate memory, a distillate of images, shaped by her family's stories and the testimonies of those who returned alive.

As a meta-witness herself, she processes the past and transforms the inherited trauma into a purifying journey that leads to forgiveness, to the abyss of the lake that was the cenotaph of the people who were murdered in the concentration camps.