Stockholm 1950 is experiencing a gold rush, after the discovery of gold during the building of the new underground. Assistant Borgkrona (Järrell) owns a plot in the gold area. The lawyer Målbrott informs Borgkrona that he has inherited a haunted castle and must stay there for a fortnight. However, once at the castle he meets his old relative who is a ghost (Järrell) and the two trade places.