Name: Lockbox
Director: Daniel Stamm
Genre: Horror, Thriller
Released: 2026-07-03T00:00:00+00:00
Duration: 80 min
Cast: Carla Gugino, Lou Taylor Pucci, Katharine Isabelle, Aedan Edwards, Donald Sales

A haunting is usually a problem of place. Lockbox makes it a problem of custody. Carla Gugino plays Ellen, a woman who retreats to a quiet rural town after her mother’s death and takes in Winthrop, a cousin so damaged that caring for him feels like an act of faith. What she inherits with him is not grief but a pursuer, an otherworldly force that has marked Winthrop and means to take him.

Daniel Stamm builds the film as a containment story, and the title says the trap out loud. You can lock a door, a house, a secret. You cannot lock away the thing that already knows where Winthrop is. The tension is domestic before it is supernatural, a fragile household set against a neighbor’s warning that the man Ellen is protecting may be the danger itself.

The casting is the argument. Gugino has become the most dependable adult presence in modern horror, the performer directors hire when a genre film wants gravity instead of hysteria, and her run through Mike Flanagan‘s ensemble pieces trained audiences to read her composure as a signal that the story is serious. Here that composure is the load-bearing wall, because the film asks her to hold a house together on maternal instinct alone while every other cue tells her to run. Lou Taylor Pucci, a veteran of jitterier horror, plays Winthrop as a wound that will not close, all flinch and silence. Katharine Isabelle sharpens the paranoia as the neighbor who insists the victim is the threat, and the film keeps the audience unsure which of them to believe for as long as it can.

Stamm knows this register. He broke out with a found-footage exorcism that treated belief as a documentary problem, and his later studio horror kept circling the same question of whether faith protects anyone. Lockbox strips that inquiry down to two people in a house, trading the possession-movie spectacle of his recent work for something closer to a chamber piece. It is the smallest canvas he has worked on in a long time, and the discipline shows in a runtime that barely clears eighty minutes.

The material comes from an unusual place. Justin Yoffe adapted the screenplay from an episode of Knifepoint Horror, the audio-fiction series written and narrated by Soren Narnia, whose stories work almost entirely through voice and suggestion. Narnia’s horror lives in the calm of a first-person narrator describing something that should not be calmly described, and it leaves most of the terror in the listener’s head. Moving that method to the screen is its own gamble, because a podcast can keep the monster unseen while a film eventually has to show its hand. What survives the translation is the premise’s core cruelty, the idea that love for a broken relative can become the exact lever an entity uses against you. Underneath the haunting the film is really about inherited damage, the way a family’s worst injuries get handed down until someone finally refuses to pass them along.

The release strategy is its own tell. Aura Entertainment, a young distributor, is putting the film into select theaters rather than dropping it straight to streaming, betting that a recognizable lead and a built-in podcast audience can carry a limited run before MGM+ absorbs it. Horror remains the genre where small budgets convert most efficiently into attention, and cult audio fiction has quietly become a development pipeline the way comics and video games already are. Lockbox is a test of whether a following built on sound alone will travel to a multiplex.

Whether the execution matches the concept is where early reactions divide. Reviewers have praised Gugino and the film’s willingness to stay small, but the same coverage flags an unevenness in tone and effects work that a compact horror picture cannot fully hide. The supernatural mechanics are more suggested than explained, and viewers who want the rules of the hunt spelled out will not get them. The film never settles what Winthrop actually is, or whether his trauma summoned the force or merely marked him for it. That ambiguity is either the point or the ceiling, depending on your patience for it.

Gugino, Pucci and Isabelle head a cast that also features Aedan Edwards and Donald Sales. The picture was shot in Vancouver and produced through Peak Pictures, Capstone Studios and the revived horror label Dark Castle Entertainment, with Bright Light Pictures among the production partners. Aura Entertainment holds distribution, with MGM+ set as the streaming home.

Lockbox opens in select US theaters on July 3, 2026, before moving to MGM+. No Spanish or other international theatrical dates have been confirmed at the time of writing. For a distributor still building its name, a lean genre title with a bankable lead and a cult-podcast pedigree is a sensible bet. Whether it becomes more than that depends on how many people still want to be locked in a room with the thing they cannot see.