He wakes up in his underwear, trapped in a modernist but spare cell with track lighting, a computer terminal, a sink, a toilet and a lot of questions, one of which matters most of all.

“What’s going on?”

It’s not clear at first, or even after a bit. His Spartan surroundings make this seem like punishment or “a test,” he figures. Purgatory?

“Will somebody go see about my dog?”

That computer screen, through which we view the unnamed-but-numbered man (Melvin Gregg), shows us digital interface graphics (backwards, as we’re peering through “it” at “him”). And while that screen gives him no straight answers, the word “Share?” seems something his captor/tormentor/deity is obssessed with.

“So you want me to share?” What, exactly?

Well, maybe just a bit of himself dancing, fooling around, hurting himself attempting a handstand.

“Sharing” earns rewards, among them screen contact with another inmate (Bradley Whitford), a chatterbox wiseass and apparently a screenwriter. Whoever or whatever has imprisoned them wants its inmates to put on a show, provide “content.”

Other inmates see and “share” what you’re doing, if its interesting enough. And you are rewarded for that — food, furniture, clothes. The second inmate has obviously figured this much out and has been complying for a while.

But that showering woman (Alice Braga) whose screen is shown our first inmate as a “reward” for something? She’s pissed at being Peeping Tom’d.

“Share?” is a social media/”attention economy” parable that feels like a “COVID” lockdown production. The camera is fixed, with a lone point-of-view, and the cast is isolated with no human contact. There was probably just one set, redecorated for each “inmate” the film peeks in on.

But the movie? After a dull and slow start, the Benjamin Sutor script introduces online character “types” (the pretty young woman — Danielle Campbell — who gets attention for leading “just breathe” exercises in skimpy clothes), “rewards” and what might be punishments, all of it seemingly self-sustaining/self-policing.

Time is devoured, attention-grabbing “performance” is rewarded and the sense of the “trap” of it all slips into the background even though some unseen, unheard and unknown entity is serving up rewards and the inmates’ basic needs.

Just like much of the Internet.

The cast — Gregg was in TV’s “Snowfall,” Whitford’s beein in everything and Braga’s career has taken her from “Elysium” to “The Suicide Squad” — gives good value with performances restricted in space and movement.

The story’s conflict, which hangs on “accepting” this “sentence,” or crowd-sourcing possible means of escape, is only mildly interesting as realized by first-time feature director Ira Rosensweig, whose prior credits appear to be music and corporate videos.

Coming out as a major crowd-sourced social media site is facing death by an expensive, oligarch-and-dictator-backed “catch-and-kill” because of its essential role in organizing dissent, the minimalist “Share?” does manage to be thought-provoking, just not thought-provoking enough to recommend, any more than its exercise in single-set-up filmmaking is.

But it does make one ponder the “prison” social media can become unless you’re of the pretty-young-thing-posing-for-“follows” and “subscribers class.

Rating: unrated, violence, a sexual situation, some nudity

Cast: Melvin Gregg, Bradley Whitford, Danielle Campbell and Alice Braga.

Credits: Directed by Ira Rosenweig, scripted by Benjamin Sutor. An XYZ release.

Running time: 1:18