A tony, high-rise restaurant filled with potential suspects, any one of whom might “airdrop” the threats and blackmailed instructions for a murder onto our shocked and frantic heroine’s cell phone, is the setting and plot of “Drop,” a middling horror thriller from the director of the “Happy Death Day” movies.

Dark, bloody humor is director Christopher Landon’s brand (Remember that Netflix kneeslapper “We Have a Ghost?”), so brace yourself for murderous blackmail, domestic violence, terrorizing a child and suicide giggles in this thriller, which is in the “Sorry, Wrong Number” and “Phonebooth” tradition.

Unseen villain is close-by making villainous threats by phone. Who could it be?

It’s predictably suspenseful, talky-texty and glib. But it’s got Emmy-nominated “White Lotus” star Meghann Fahy in the Jessica Rothe role, so let’s see what she’s got.

Violet is a Chicago counselor whose speciality is treating abused women. A violent opening scene tells us she was the victim of such abuse herself, surviving an attack by her husband (Michael Shea) who ended up turning a gun on himself.

A few years later, she’s finally ready to dip back into the dating pool. She’s got her sister (Violett Beane) close-by, ready to babysit Violet’s five-year-old son Toby (Jacob Robinson) and give Big Sis a sexy makeover before she heads out to her date at posh Palette, a trendy fine dining eatery encased in glass on the side of a sidescraper.

Her date Henry is late, so she throws herself into meeting or checking out the setting’s various “suspects” within “AirDrop” range of her iPhone. Because one of them will threaten her freedom, her future and her son if she doesn’t agree to murder on the first date.

The film’s sickest joke might be casting bearded Brendan Sklenar as “Henry,” because he’s almost a dead ringer for the dead husband. So, abused women have a…type?

Over the course of 90 or so cat-and-mouse minutes, Violet will try to outwit and outmanuever if not outtalk our very talkative villain as we learn what this person wants and why.

“I’m playing CHESS, here,” bad guys always say before we figure out that they’re not as smart as they keep telling us.

Fahy does a decent job conveying vulnerability, even if the desperation that should figure in seems a tad tame until the third act. Sklenar is mostly just a hunky paw here.

The set-ups are somewhat obvious in The Foreshadowing and the Furious. The not-so-big-twist climax could not be more talkative. But the screenwriters would be lost without their “talking villain” in a movie built on photos, babysitter cameras, texts and cell calls.

Still we’ve got a child and babysitter and unsuspecting date in danger, a room full of fine diners and staff suspects and a decent leading lady. Maybe it’ll all work out in the end. Or not.

If only she’d bought an Android.

Rating: PG-13, violence, profanity, sexual content

Cast: Meghann Fahy, Brendan Sklenar, Reed Diamond and Violett Beane

Credits: Directed by Christopher Landon, scripted by Jillian Jacobs and Chris Roach. A Universal/Blumhouse release.

Running time: 1:34