The new science teacher Dr. Julian Olcott with a mysterious past arrives in an institutional boarding school for troublemaker girls. Along the night, the intern Mary Smith, who is blackmailing another teacher - Sir Alfred Whiteman - with some love letters, is slaughtered by a werewolf. The detective in charge of the investigation attributes the crime to a wolf, while her mate Priscilla believes she was killed by Sir Alfred. On the next days, other deaths happen in the school, reducing the list of suspects.
Carl Schell
as Dr. Julian Olcott
Barbara Lass
as Priscilla
Curt Lowens
as Director Swift
Maurice Marsac
as Sir Alfred Whiteman
Luciano Pigozzi
as Walter Geoffrey
Joseph Mercier
as School Porter
Michela Roc
as (as Maureen O'Connor) Leonor MacDonald
Anni Steinart
as Sheena Whitman
Mary McNeeran
as Mary Smith
Grace Neame
as Sandy
Herbert Diamonds
as Police Inspector
John Karlsen
as