The movie kicks off with its opening credits set against the backdrop of Monday nightlife on March 21, 2005, at 19:55 Vancouver Time, in Vancouver, British Columbia, Canada. We're introduced to Wendy Christensen (played by Mary Elizabeth Winstead), an obsessive-compulsive high school graduate from McKinley High, who captures moments of her friends during a thrilling ride known as the "High Dive." As she snaps a photo, she inadvertently observes that the letter "V" is missing from the ride's name but dismisses it without a second thought.
As the story progresses, we meet several characters who contribute to Wendy's world, including her boyfriend Jason Wise (Jesse Moss), her best friend Carrie Dreyer (Gina Holden), and her other boyfriend Kevin Fischer (Ryan Merriman), along with additional figures such as Lewis Romero (Texas Battle), the trendy duo Ashley Freund and Ashlyn Halperin (Chelan Simmons and Yan-Kay Crystal Lowe), social misfits Ian McKinley and Erin Ulmer (Kris Lemche and Alexz Johnson), Wendy's sassy sister Julie (Amanda Crew), and the troublesome alumni Frankie Cheeks (Sam Easton).
As the premonition unfolds, malfunctioning components come into play; a hydraulic pump under Lewis Romero's seat exhibits leaks just as the attendants secure his seat restraint. The pivotal moment occurs when Wendy snaps a picture on the roller coaster, only for an attendant to wave in front of her, ruining the shot. Kevin offers to stash her camera in his jacket, while Frankie, overhearing the rules, hides his video camera in his own clothing. The excitement of the ride turns dire when Kevin's fingers become stuck in sticky gum, leading to a cascade of calamities.
Once the ride initiates, the chaotic scenario escalates as the leaking hydraulic line begins to rattle and loosen. Amidst the roar of the coaster, Frankie shouts for Ashley and Ashlyn to flash him, and the ensuing commotion causes a camera to snag on the tracks; this vital chain reaction leads to a catastrophic failure of the roller coaster when crucial components and restraints disengage. Horror ensues as the passengers desperately cling to their seats, navigating a whirlwind of corkscrews, hills, and erratic turns.
In a heart-stopping moment, the front carts detach from the rest, resulting in fatalities including Carrie, Jason, Ashley, and Frankie, among others. Meanwhile, Kevin and Lewis face terror as well; while Lewis is thrown out of his seat but somehow clings on, Kevin's attempt to save him results in unimaginable tragedy, severing his connection to life.
After this shocking roller coaster disaster, it’s revealed that Wendy's horrifying experience was merely a vision. As she spirals into panic, a frenzy unfolds, leading to a chaotic evacuation where Wendy desperately tries to save her friends but fails to prevent further disaster.
Weeks later, the trauma lingers as Wendy grapples with her loss, haunted by premonitions that imply this sequence of death isn’t over just yet. The narrative spirals from the tanning salon inferno where Ashley and Ashlyn meet a gruesome fate, transforming the tale into a relentless pursuit where Death is depicted as a predatory force that cannot be eluded.
Wendy and Kevin work frantically to defy the grim design of fate, deducing patterns from their tragic friends' deaths and navigating their chaotic lives. Their investigation plunges them into heart-stopping incidents, each more ghastly than the last. Close calls ensue, from horrific accidents involving flying debris to the terrifying realization that Death is keeping score.
As the climax approaches, events reunite Wendy with tragedy at a local fair, where fireworks spark chaos, leading to a shocking death and the grim understanding that their survival is a fragile balance against the relentless grip of fate. The story crescendos into an unsettling conclusion as she grapples with the profound implications of life, death, and the inescapable nature of her premonitions.
Ultimately, the chilling narrative closes with Wendy’s fragile grasp on reality as she witnesses the fateful events unraveling once more on a subway, forcing the audience to confront the unrelenting specter of death and the poignant human desire to escape its clutches. As she screams warnings, the film leaves us with heavy hearts and lingering chills, exploring themes of fate and the unpredictable nature of life and death.
