School supply teacher timid folk art Ales Brabec won first prize at a music festival and will therefore offer to work for the Prague little theater in the basement. Its director Soukup just needs a few songs for the upcoming musical, and so is willing to do everything to Alex to create the right atmosphere for composing.
A sincere provincial young man, Frantisek Koudelka leaves to work in Prague. For the trip he buys a computer made horoscope with biorhythms charts, marked according to his date of birth, there are trappy, precarious, unsuccessful and even critical days and few successful days. The clumsy luckless person Frantisek has finally a guidance for his life.
It is 5 May 1945 and the uprising against the hated German occupiers has broken out in Prague. The Czech guards open the gate of the Pankrác prison to allow the prisoners to escape en masse. Many of them are shot dead by the German guards but young Ruda (Jaromír Hanzlík) manages to run away. He is taken care of by one of the Prague fighters, concierge Kytka. Kytka hides him in the flat of the house's owner where only the young maid Karla (Jana Brejchová) is left, ordering her to take care of Ruda.
