.rar files are compressed archives, and .part2 suggests that this is the second part of a multi-part archive.Challenges: If extraction doesn't work smoothly:
A hidden door opened when Jonah tuned the old piano in the corner to the nursery-key sequence. Behind it, the final clip played on a battered monitor. This time the footage was first-person: a camera mounted on someone’s chest as they walked through a door, into a white room that smelled of bleach. The screen shimmered. The camera caught faces — the director, the producer, Renee — their expressions folded in panic and calculation. The camera turned. It looked up at the ceiling and then down at itself. The last shot was of a hand reaching toward the lens. The footage cut to static. Beneath the static, a child’s lullaby hummed on repeat. FC2-PPV-4508235-2.part2.rar
To work with RAR files, you'll need software capable of handling them. Some popular options include: FC2 : This likely refers to a content provider or platform