“It’s What’s Inside” is a high-concept body-switch thriller that relies on performances to convince us that this or that little-known to utterly-anonymous actors has switched roles to come off.

They don’t and it doesn’t.

While writer-director Greg Jardin does his level best to bowl us over with “technique” (split screens, endless 360 degree handheld pans, etc.) and does a decent enough job at complicating his role-playing-game-run-amok plot, a somewhat bland cast of players can’t manage to convince us that they’re possessed by the mind and spirit of someone else.

Making all of the characters “types” — the influencer, the tech nerd, the Buddist hippy chick, the rich dude, the hothead — and the other three so uninteresting as to barely qualify as “types” doesn’t help. Because these college pals meeting years after school at the mansion of the richest member of their ranks aren’t distinct enough as characters and aren’t good enough actors to “suggest” that some other colorless character is under their skin.

The best-known among this crew is “White Lotus” alumna Brittany O’Grady, playing the seriously sexy but shy Shelby who can’t interest her not-in-her-league beau Cyrus (James Morosini) to role-play revive their years-together-and-no-ring sex life.

That doesn’t keep them from showing up at the pre-wedding fete rich Reuben (Devon Terrell) is throwing himself at his artist/mother’s country estate.

Reuben also invited pretty advice-to-the-lovelorn vlogger Nikki (Alicia Debham-Carey), artist Brooke (Reina Hardesty), hippy Maya (Nina Bloomgarden) and blustery “bro” Dennis (Gavin Leatherwood).

And as a wild card, he’s summoned the guy whom he and Dennis had a hand in getting expelled from college. Forbes (David W. Thompson, whose credits go back to “Win Win”) went West and became a tech success. Is he still holding a grudge?

The “edge” of his arrival is taken off by this gadget he brings in a green suitcase. You just tape a couple of electrodes on your skull and those skulls around you and this thingy (VERY analog looking) will “download” your “brain files” into whoever, with other “brain files” uploaded into your head.

This gadget is basically an electronic aid for “role playing,” as characters body-switch and act on impulses — cheating, tricking, betraying, or in the case of Cyrus and to some degree Shelby, “avoiding” that outcome.

“Call me Nikki!” “Nikki.” “Say it AGAIN.”

The conceit doesn’t work because nobody in this in crew is convincingly switched to another body. The cast is a pretty and pretty generic lot stuck playing a forgettable collection of types. And even the more outgoing characters, the easiest ones to “switch,” make little impression in that regard.

And then there’s an “accident” and the party turns to chaos as characters blackmail one another to achieve some goal — a sexier life, a richer life, a better pairing, avoiding jail, etc.

The final act works much better than the earlier ones because the performances finally achieve some level of “out there,” with bigger emotions, higher stakes and evil twists that arrive in a seriously confusing blur.

But even then, the cast doesn’t manage to adequately convey a new persona inside someone else’s body. A lame joke about whether Dennis has license to use “the N-word” when he’s inside Reuben is about as far as that goes.

The title “It’s What’s Inside” demands that we buy in to the switches. But the cast’s inability — pretty much to a one — to manufacture the externals necessary to make their transformations believable does in writer-director Greg Jardin’s superficially showy feature film debut.

A little less camera blocking and a lot more rehearsal could have worked wonders on this set.

Rating: R, sex, violence, profanity

Cast: Brittany O’Grady, James Morosini, Alicia Debnam-Carey, Devon Terrell, Gavin Leatherwood, Reina Hardesty, David W. Thompson and Nina Bloomgarden

Credits: Scripted and directed by Greg Jardin. A Netflix release.

Running time: 1:43