Director: Daniel Stamm
Some family secrets stay buried for a reason, and this 2026 supernatural thriller builds its entire tension around one cousin's refusal to let hers stay that way.
What is Lockbox about?
When Winthrop, a withdrawn and unpredictable relative with a history nobody in the family wants to discuss, becomes the target of something that clearly isn't human, his cousin is the only one willing to step in. Carla Gugino plays a woman forced to choose between distance and loyalty as an unexplained force closes in on Winthrop from every direction, turning ordinary rooms and quiet nights into places of dread. Director Daniel Stamm, working in the slow-burn dread register he's known for, lets the horror build through suggestion and atmosphere rather than jump scares stacked back to back, saving its most unsettling moments for when the audience least expects release.
Cast & crew
Carla Gugino carries the emotional center of the film, playing protector and skeptic in the same breath as she tries to make sense of what's happening to her cousin. Lou Taylor Pucci takes on the volatile, hard-to-read Winthrop, while Katharine Isabelle brings a sharp, unsettling energy to a supporting role that complicates the family dynamic further. Roman Kinsella and Donald Sales round out a cast built to keep the audience guessing about who can actually be trusted.
Context & significance
Lockbox is a co-production spanning the United States, Canada, and the United Kingdom, reflecting the increasingly international footprint of mid-budget horror filmmaking. Daniel Stamm has built a career on stories where the scariest thing is never fully seen, and this film continues that pattern, favoring dread over explanation. At 105 minutes, it stays tightly focused on a single household and a handful of characters rather than sprawling into a wider mythology, which keeps the tension concentrated rather than diluted.
Where & how to watch
Lockbox streams on K-Time with a free account login, on a platform built around a fully Farsi interface for Persian-speaking audiences. There's no trial period or pricing comparison to navigate here; this page, its cast details, and background notes are free to browse for anyone, and only watching the film itself requires signing in.