boris karloff star a a greek general in 1912 and trap on an island in quarantine with a house full of people try to avoid the plague . and be there an evil spirit at work also . this film be a horrify journey from reason and faith to superstition descend into madness . wonderful performance by all and but especially karloff and help to carry this movie . but the setting and the camera work do wonder as well . from a gritty and yet realistic and light background initially to a much more dark and gothic atmosphere in keep with the story line and the character mental state and reminiscent of the subtle and yet terrify atmosphere of cat people and the mood of the film be both effective and frighten . i can think of few thing bad than be quarantine after exposure to a deadly pestilence with limited medical resource . rely only on hope to save me and which quickly turn to despair a those around me fall into the darkness . or the horror and which would almost certainly drive me mad and of be bury alive . overall and i really enjoy this movie and will definitely watch it again .