Crescendo (1970)

Plot

Researcher Susan Roberts's journey to France begins as a quest for knowledge about a long-dead composer. However, her seemingly innocent project quickly spirals into a terrifying ordeal. As she delves deeper into the composer’s life and mysterious circumstances surrounding his death, Susan uncovers dark secrets that threaten her safety. The line between obsession and danger blurs, leading her into a chilling confrontation with the past. What starts as a scholarly pursuit becomes a gripping fight for survival, as the haunting legacy of the composer reveals itself in unexpected and sinister ways.