photo courtesy of Hulu
“No One Will Save You” offers fun scares and thrills with little dialogue. (photo courtesy of Hulu)

The Halloween season is almost upon us and one modest horror flick starts things off with a fun experiment: silent thrills. The protagonist of “No One Will Save You” never shares a word with another character, and it works well enough to keep this brisk story moving.

If “A Quiet Place” and its sequel felt too, well, quiet, this one might drive you to madness. Brynn (Kaitlyn Dever) is a small-town outcast. She lives alone in an enormous house, acres away from neighbors. The locals ignore or outright shun her. The reason why eventually comes, but her isolation is a key theme, accentuated by the absence of discourse.

“No One” includes ample sound, just not folks talking to each other. This is hardly free of words wholesale, but Brynn’s lines, the only ones ever heard, maybe total 10 words. In lieu of speech, we endure screams, heavy breathing from evasion and all the signature sounds associated with a home invasion. But this particular invasion features a different kind of unwelcome guest in the middle of the night: little green men.

To its credit, “No One” doesn’t waste time. After 10 minutes of backstory, the chase begins. The rules for these aliens are unclear throughout the film, resembling mind-bender installments from “The Outer Limits.” But the aliens’ reasons are unimportant. They come and Brynn must survive, encountering different variations of the enemy and their tech.

Of the tech, mystique is the key here. What are these off-worlders after? How organized are they? What weapons and abilities do they employ? The answers roll out in waves, but a complete picture never arrives. That might infuriate some, like that spinning totem in “Inception,” but having all answers shouldn’t be the goal. That degree of satisfaction is frankly juvenile, something to encounter more, not avoid.

The lengthy sequences of catch and release between Brynn and her foe often enjoy that splendid bit of texture: her traumatic origin. This subplot often kills a good horror film, adding depth where none really exists or poorly exhibiting it through tiresome, cheap monologues that evoke a cringe not empathy. And Brynn’s character history directly explains her fate in an ending most spectators won’t see coming (please don’t ruin it for yourself).

This is a modern-day “Twilight Zone,” embracing ambiguity, topped with a little “Body Snatcher,” even some “Signs.” Perhaps that cocktail makes the outcomes a bit less original. True enough. But this is cinematic competence, easy viewing for its strong execution and clever premise. It doesn’t break new ground, but it’s still impressive.

Few films can pull off complete focus on single characters in an entirely visual story. Plenty try, to their demise, resulting in tedium or snores. It’s a playful novelty here that permits those few words to stand out even more.

Brynn (Kaitlyn Dever) must endure an alien invasion in “No One Will Save You.” (photo courtesy of Hulu)

And Dever (“Booksmart,” “Rosaline”) is a true up-and-coming star who takes on unique roles. Of course her first foray as a final girl proves just as interesting as those other performances.

This is likely writer-director Brian Duffield’s (screenwriter for “Love and Monsters,” “Underwater”) opus. As his sophomore feature at the helm, it sets a promising tone for what comes next. Hopefully more studios let him do his thing unfettered by concerns that he might break the mold too much.

“No One Will Save You” is a modest success, focused in its purpose. It never drags or dwells on tiresome details, expertly engraving character into a story whose appeal is a touch more interstellar. Does the ending entirely land? Maybe not. But it’s hardly out of bounds despite a tonal shift followed by several web searches to ensure you entirely got it.