Black Flame, by Gretchen Felker-Martin

The Baroness, an infamous exploitation film long thought destroyed by Nazi fire, is discovered fifty years later. When lonely archivist Ellen Kramer—deeply closeted and pathologically repressed—begins restoring the hedonistic movie, it unspools dark desires from deep within her.

As Ellen is consumed by visions and voices, she becomes convinced the movie is real, and is happening to her—and that frame by frame, she is unleashing its occult horrors on the world. Her life quickly begins to spiral out of control.

Until it all fades to black, and all that remains is a voice asking a question Ellen can’t answer but can’t get out of her mind.