Zack Snyder’s upcoming action-thriller, "The Last Photograph," is set to premiere at the Toronto International Film Festival on September 13. A nearly three-minute trailer has been released, showcasing a grittier, more melancholic tone than many of Snyder’s previous works.

The film’s official synopsis describes the plot as following an ex-DEA operative, Ethan Black, who returns to South America to search for his missing niece and nephew after their diplomat parents are murdered. He enlists the help of a war photographer, who is the only witness to the killings, embarking on a journey that forces him to confront his own past.

Snyder directed and shot "The Last Photograph," which he also wrote the story for. The screenplay was handled by frequent collaborator Kurt Johnstad, known for his work on "300" and "Rebel Moon." The music is composed by Hans Zimmer, Omer Benyamin, and Steven Doar. The film was produced by Snyder’s company, The Stone Quarry, alongside Hollywood Gang Productions and Telecinco Cinema.

This project marks a stylistic departure for Snyder, who is widely recognized for blockbuster superhero films like "Man of Steel" and "Justice League," as well as "300" and "Watchmen." The tone of "The Last Photograph" appears to draw inspiration from "Heart of Darkness" and its adaptation "Apocalypse Now," focusing on sensory details and violence with a melancholic rather than bombastic approach. Snyder has reportedly been developing the movie for years, with the initial idea surfacing in the mid-2000s.