The Angels design an ingenious and at the same time merciless plan to achieve their goal. The plan shapes up when two men on earth meet each other apparently by coincidence. One is Onno Quist , an eccentric linquist and son of a former Prime Minister. The other is Max Delius, son of a Nazi father and a Jewish mother. The two men become friends. Only one person can intrude into the intimacy of their friendship:Ada Brons, a young cello player.