Planet Earth is visited by an extra-terrestrial named Gum Gam.

One night, the famous robber Merzavio comes to the house of archivist Jiří Havříček, the most educated man in town. Merzavio asks the archivist to become a teacher for ten years for his two hooligan sons Vincek and Frantik.

An unusual story that happened a long time ago in the city of Eulenberg, in a house where a terrible Ghost lived...