The Lineage of Cain (1971)

Mystery
Crime
Horror

The relatives of a young rebellious hier to a fortune (Dean Reed), who spends most of his time on a yacht, try to have the kid interned as a madman, but are mysteriously killed one by one, in the family's villa. A girl (Stefania Careddu), lost at sea and saved by the young man, will also have some surprises in storeā€¦ This giallo was filmed in 1969 but not released until two years later and remains extremely rare.