What a random, almost plotless debacle “The Nun II” turns out to be.

Three screenwriters — one assumes (this is AI-generated bad) — took characters created by James Wan and Gary Dauberman, and sort of half-assed their way into giving two survivors from “The Nun” another battle with the wimpled menace, and Bonnie Aarons an excuse to doll up like a murderous Marilyn Manson in a habit.

I’m sitting there, dilligently taking notes, and writing in large, scribbled-in-the-dark letters, “When are they going to tell us what the hell this is about?”

They’ve got to bring The Nun back, resuscitate the demon and all that. They turn her loose on assorted locations, the primary one being in 1956 France. But why? What’s her beef this time?

The attempt to “explain” and “motivate” the murderess may be the lamest bit of plot-engineering outside of the Rob Schneider Universe. It’s shoehorned in, dropped into the plot by research we don’t see (Were any Catholics involved in making this movie?) and supposedly carried out by young Sister Irene (Taissa Farmiga, not great but not her fault).

Irene must hurry to France to a Catholic girl’s school where a teacher (Anna Popplewel) and her student-daughter (Katelyn Rose Downey) are among those menaced by some shadowy presence, dreamed about and glimpsed in shadows, and in the movie’s “money” moment, manifested in a collage created by a hellish wind that blows over the titles on a newstand’s magazine rack.

That school is where “The Nun” survivor handyman Maurice (Jonas Bloquet) landed. Coincidence? Ya-think?

The deaths are gruesome, the jolts cheap and the best effect is keeping the Mansonesque made-up Aarons in the shadows, menace incarnate.

I think the most hilariously stupid thing that happens here is having the He Man Girl Hater’s Club known as the Vatican send some plump, pampered archbishop stereotype to summon Nun-survivor Irene, a slip of a thing, to find out what this “demon” is up to this time. And, you know, deal with it. She is the “only one” who “has experience” with this demon.

“The Church needs another miracle.”

Even taking her 20something bestie from the convent (Storm Reid) with her tells us there are going to be two overmatched young women tossed about like little ragdolls, hoisted into the air and choked and who will only survive if the Satanic Sister (Aarons) or some minion or cloned manifestation of that Nun get bored torturing them to death.

Me? I was only bored for maybe 100 of the 108 or so minutes of this mess. There’s only so much admiring the production design will do for you.

Rating: R, violent content (terror?)

Cast: Taissa Farmiga, Jonas Bloquet, Storm Reid, Anna Popplewel, Katelyn Rose Downey and Bonnie Aarons.

Credits: Directed by Michael Chaves, scripted by Ian Goldberg, Richard Naing and Akela Cooper, based characters in the first “Nun” movie. A Warner Bros./New Line release.

Running time: 1:48