The enchanted university laboratory
The students enter the premises of an old Bulgarian university and go into an old laboratory. For their surprise they hear the voice of a woman who greets them and explains that she used to work in the lab. This had been the place of her most memorable researches. Suddenly the doors are closed and the students are trapped in the laboratory. Scared they realize that it is filled with old chemicals and machinery which could potentially harm them or even kill them. They have one hour to solve a group of puzzles in the field of physics (nuclear physics), chemistry and technology in order to escape the dangerous situation. The scientist who greeted them is Elizaveta Karamihailova, the first woman assigned the position of a professor in Bulgarian higher education and a nuclear physicist, who guides them in the lab and explains the use of the dangerous appliances and chemicals in the laboratory.