In the 1950s, Ludvik Jahn was expelled from the Communist Party and the University by his fellow students, because of a politically incorrect note he sent to his girlfriend. Fifteen years later, he tries to get his revenge by seducing Helena, the wife of one of his accusers.
The Lavicka's, a Czech family from the city, rents a house in the country with the option to buy. However, old Mr Komarek seems reluctant to sell the house as they agreed.
Robert is a SF writer, who realizes that he can make his thoughts material. Because of that, a group of aliens arrives to Earth. Their leader is Andra, who shows affection for Robert, which does not please his girlfriend, Biba. A monster, Mumu, has arrived together with the visitors from space.
