A popular singer is found murdered and two police detectives are investigating his past in order to catch the killer.
In the moment when Belgrade industrialist Života Cvijović had dreams to marry off his son Milorad, Doctor of Philosophy, to a minister of transport's daughter, a telegram from Milorad's professor from Heidelberg arrives, saying that he wants to visit them. Bad luck is that Velimir, a poor student, was financed by Milorad, and studying under his name received a diploma.
A film crew wants to make a serious drama, but the investors agree to fund the movie only if they make something funny. Hence the drama becomes a comedy with famous singer Đorđe Marjanović in star role.
