Based on true events, acclaimed writer-director Lucia Puenzo (XXY) adapted her book, WAKOLDA, to create a dark and intense dramatic thriller about the hidden identity of the 'German Doctor'. When a scientist befriends an Argentine family, in particular their young daughter Lilith, they unknowingly strike up a friendship with one of the world's most terrifying war criminals, Josef Mengele, the Nazi doctor who is on the run for his crimes in Auschwitz post World War II. As he starts to penetrate their everyday life and offer growth hormone therapy to Lilith, the family's father becomes suspicious of this charismatic yet charming lethal man.