There's a house that looks and feels like any other, with a mother and her children who are brothers - and there's a wall around this plot, the other side people are not, and they will not get the chance, to rediscover. As the father is the commandant of death, responsible for taking their last breath, though he lives without a care, just like his wife who loves it there, and it's clear they're very proud, of their success. After all, you have to have a certain mind, to exterminate a race of humankind, and then live a normal life, without guilt, or strain, or strife, in a house, with a big wall, to hide behind.