All the events described in thisbook begin just a couple of weeks before Christmas and take place in the cityof Zurich. All members of the Rosenberg family live a calm, slow-paced life.The head of the family, Martha Rosenberg has a job she likes a lot in a largeSwiss bank. Her children, Mark and Greta, live the lives of ordinary teenagerswith school on weekdays and various exhibitions and museums on weekends. And nothing meant trouble it seemed.No one thought about it anyway.