What 2019 horror film follows a woman who wakes up in a desolate field with amnesia and is subsequently pursued by a mysterious, malevolent figure?

The film The Dreadful (Review) does not fit the description of a 2019 horror film about a woman who wakes up in a desolate field with amnesia and is pursued by a malevolent figure. "The Dreadful" is actually a Gothic horror film slated for release in 2026.

Directed by Natasha Kermani, this movie is set in 15th-century England during the Wars of the Roses. It centers on Anne and her mother-in-law Morwen, two impoverished women who live on the outskirts of society while awaiting the return of Anne's husband, Seamus, from war. Their lives take a dark turn when Seamus's childhood friend, Jago, returns with news of Seamus's death, leading to desperate schemes and the unsettling appearance of a mysterious armored knight.

The plot of "The Dreadful" is inspired by a Shin Buddhist parable, which also served as the basis for the 1964 Japanese film "Onibaba". It explores themes of greed, survival, and the corrosive nature of the stories people tell to justify their desires. While it features a mysterious figure, the narrative does not involve amnesia or a woman waking up in a desolate field as described in the trivia question.