4 Tage bis zur Ewigkeit (1969) on Netflix

Based on the mysterious legend of Idilia Dubb. Germany, 19th century, Middle Rhein Valley. The dreamy Idilia (Lea van Acken) awakes injured in the midst of a gloomy castle ruin and can't remember anything that happened before. When she discovers in horror that there is no escaping the towering castle walls, she begins a grueling fight for survival. Only her nebulous diary can help her decipher the past, which exposes a secret romance with Abyssinian actor Caven (Eric Kabongo), a performer in a human zoo exhibition run by her fiancee Franz Hagerberg (André M. Hennicke). Idilia's written record, however, blurs the lines between reality and fiction.