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

Renée Rewach meets him at the moment of his despair when he learns that his family has been obliterated, and she promises with her work Tehom (a biblical Hebrew word meaning the primordial depth) to lead him to the crime scene that he never found the courage to visit until his death.

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

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