Marianne de ma jeunesse (1955)

A new teenage student arrives at a prestige boarding school in Bavaria, having not only the ability to play the guitar and sing, but also to charm animals and detect ghosts. Quickly becoming part of a secretive club of five other students, he is inadvertently stranded by them at an abandoned chateau on an island in the middle of a large lake, where he encounters an enchanting young woman who wants to escape... Also filmed in a separate German-language version with largely different cast, MARIANNE MEINE JUGENDLIEBE, q.v.