The story of Eman Diblínek, who would like to have a romantic and, above all, extramarital affair with a typist named Heda, so he asks his friend, the writer Arnošt, to lend him his apartment. Arnošt is "coincidentally" leaving his apartment permanently, so he lets Eman use it, which sets off a series of humorous and romantic misunderstandings that Arnošt could not have imagined even in his novels.