In a Near East land, a German company building waterworks and mining copper is threatened by foreign interests.When the chief engineer is framed for a murder, the nephew of the ambassador makes a heroic sacrifice.

The popular trapeze artist Cora is married to the respected doctor Frank Crippen. After a party at the Crippens' house, Cora suddenly disappears. Apparently, she traveled to Brazil alone overnight. However, a friend of the couple is skeptical and calls the police. While excavating the garden, Inspector Düwell makes a gruesome discovery: body parts. Meanwhile, the prime suspect, Dr. Crippen, has already gone into hiding...