(NBC News) —Tonight on “Dateline,” when actress Wyn Reed auditions for the indie horror movie, “From the Dark,” she impresses the directors and lands the role of a young woman who shoots an assailant in self-defense. After filming wraps, a real-life plot twist reveals Wyn isn’t whom she says she is, as the cast learns their lead actress has been charged with killing her uncle.

Tonight’s all-new episode features exclusive footage of the never-before-released film.

Here’s a preview of Keith Morrison’s report:

This is a horror movie. Oh yes. A horror movie with all its requisite darkness. Its setting, its spine-chilling story, its disturbing characters. But, really, where does performance end, and reality begin?

OPERATOR: Jackson County 911 emergency.

OPERATOR: Tell me what the emergency is.

UNIDENTIFIED FEMALE SPEAKER: All I can tell you is a gun went off.

This is also a story about family. About ambition, accomplishment, sharing.

OPERATOR: Are you in danger?

UNIDENTIFIED FEMALE SPEAKER: Yes.

OPERATOR: Okay, is the person that did the firing of the weapon, are they there now?

UNIDENTIFIED FEMALE SPEAKER: Yes.

So yes, a horror movie.

Watch tonight’s all-new dateline featuring exclusive footage of the never-before-released film, on NBC4 at 10 p.m., followed by NBC4 at 11.