It is hard to be a prince and a princess, you have to learn etiquette, perform boring tasks of a governess, madame Discipline, and have time to attend school. So how great it is that there are always monsters nearby, ready to come to the rescue and arrange an unforgettable fun! Emil and Margot are waiting for an amazing adventure: they will hunt down nightmares, disrupt a gardening lesson, go on a tour behind a mirror frame, and do much, much more. The main thing is not to get caught by the governess: she can not stand monsters. They are forbidden to enter the castle!