The deportation of 4000 Jews from Budapest to Auschwitz in July 1944, as told by George Tabori, and how the narrator's mother escaped it, owing to coincidence, courage and some help from where you'd least expect it.
Igor has a good job as an advertising manager, a nice house, his wife Hanna, and a mistress. He has invited Christine, the mistress, over to his house while his wife is away.