The Vienna Song of Death: Excitement in St. Stephen's Cathedral. Crime scene: While working in the garage beneath St. Stephen's Cathedral, forgotten catacombs from the Middle Ages are discovered. A sensational find with a spooky factor! The oldest catacomb lies entirely beneath one of the neighboring houses. Its resourceful owner has a lucrative business idea: he wants to renovate the burial sites and convert them into magnificent luxury tombs for wealthy clients. But that's not all: the entire complex is to be opened to visitors as a museum. However, while there is still intense debate about the project, the first "beautiful corpse" soon appears. Death under mysterious circumstances - was it really suicide? One of the interested parties for the Vienna luxury burial site falls from the south tower of St. Stephen's Cathedral. Clearly a suicide. Or is it? Then threatening messages start to appear in the vicinity.