The Only One (2026): Cast, Story and Release Details

Prepared by Movies Dock Editorial

The Only One is a horror mystery centered on Zoe, whose former partners are killed one after another. With suspicion focused on her, she joins forces with old friends to clear her name and identify the masked Prince Charming killer behind the attacks.

The Only One is a 2026 horror film directed by Michael Schwarz and written by Martyn Pedler and Marek Polgar. Its story begins with a disturbing pattern: Zoe’s exes are being murdered one by one, leaving her under immediate suspicion.

To prove that she is not responsible, Zoe turns to a ragtag group of old friends. Together, they must investigate the killings and uncover the identity of the masked figure known as the Prince Charming killer.

The Only One movie details

Story without spoilers

Zoe becomes the focus of suspicion after her former partners are targeted in a series of murders. With the danger continuing and questions surrounding her involvement, she assembles a group of old friends to help establish her innocence.

Their search leads them toward the identity of a masked killer called Prince Charming. The premise combines a murder investigation with the pressure of trying to survive while the central suspect works to clear her name.

What to expect

The film is categorized as horror and is built around a masked-killer mystery. Viewers can expect a story involving a series of murders, a threatened protagonist, an investigation conducted by an unconventional group of friends, and the question of who is behind the attacks. The supplied information does not specify additional subgenres, setting details or the level of graphic content.

Cast and creative team

Mel Jarnson leads the cast as Zoe, with Saphira Moran as Piper, Aaron Glenane as Rufus, Ben O'Toole as Lucas, John Harlan Kim as Yuri and Vivienne Awosoga as Harper. Sam Delich plays Clarence, George Burgess plays Kane, Nick Drummond plays Blake and Emily Norton plays Becky.

Michael Schwarz directs The Only One from a screenplay by Martyn Pedler and Marek Polgar.

• Mel Jarnson as Zoe
• Saphira Moran as Piper
• Aaron Glenane as Rufus
• Ben O'Toole as Lucas
• John Harlan Kim as Yuri
• Vivienne Awosoga as Harper
• Sam Delich as Clarence
• George Burgess as Kane
• Nick Drummond as Blake
• Emily Norton as Becky

Release and production context

The Only One is listed as released on October 2, 2026. It has a runtime of 1 hour and 39 minutes and is identified as a horror production from Deeper Water Films. The supplied metadata does not provide a production country or spoken language.

Production companies: Deeper Water Films

Movies Dock view

With its focus on a suspect surrounded by a string of murders, The Only One places its central mystery around Zoe’s effort to prove her innocence while identifying the masked Prince Charming killer. The compact runtime suggests a focused horror feature built around that investigation and threat.

Film data:
TMDB · IMDb