The Ending Of Sinister Explained

There's been an ongoing debate since the dawn of the horror fandom about what the actual scariest movie might be, weighing powerful horror movies by a number of factors including critics reviews, box office draw, and personal taste. But science has spoken, and the results are in — Scott Derrickson's 2012 possession slasher drama Sinister has been determined to be the scariest movie of all time. The study measured the heart rates of 50 individuals as they watched a series of 50 horror movies, and participants' hearts were beating literally twice as high as normal during their viewing of the genuinely creepy Sinister, a film that's pushed horror boundaries by making children vicious mass murderers. 

While some might disagree with the entire premise of the study — which focused on horror films with huge jump scares that caused heartbeat spikes — Sinister is still indeed a terrifying story, made scarier by its effective use of music, lighting, and Ethan Hawke's moving, three-dimensional portrayal of Ellison Oswalt, a has-been crime writer who has no idea the danger he's put his family in, all for the sake of a new book. And if you want to understand what happens in the film's final grisly moments, then here's the ending of Sinister explained.

Trying to avoid his wife's firm but compassionate ultimatum, Ellison begins setting up his home office as if he were a homicide detective, with boards filled with crime scene photos and threads marking connections. It wasn't just that the four Stevensons were murdered on the tree still standing in the backyard. As it turns out, their daughter, Stephanie (Victoria Lee), went missing, and Ellison is convinced if he can find her, his book would set them up for life. 

But as Ellison stores things up in his new attic, he finds a box filled with Super 8 film reels labeled with masking tape. He sets up a makeshift projector screen to watch them, and the first film, marked "Hanging Out," is the footage of the Stevenson family murder in the backyard. An increasingly horrified Ellison watches the terrifying tape all the way through, and by the time it's done, he has two big questions — who made the film, and why would you film it? 

As he stares at the terrible tree in his yard, he's badly startled by Ashley wandering around the house, looking for the new bathroom. After tucking her in, Ellison's pours himself a huge glass of bourbon, and his obsession deepens with the second film reel, labeled "Family Fishing," in which a family is bound and chained in a car that's doused with gasoline as someone off-camera throws a lighted match. Ellison is so disturbed that he actually calls his enemies, the police, but he decides the killer must've left the tapes for him so he hangs up. He's about to watch the third tape, "Pool Party," when he hears another noise in the house.

Ellison keeps hearing loud noises up in the attic, so of course, he goes up to investigate. He finds a large snake hiding under a box lid, one that also features a series of children's doodles of all the aforementioned murders ... with a figure named "Mr. Boogie" scrawled alongside every event. As Ellison takes pictures of his find, the floor underneath him collapses. Since the ambulance comes to treat Ellison's injuries, so too does a deputy (James Ransome), who turns out to be a big fan of Ellison's work and wants to help. Because Ellison always thanked a Deputy So-and-So from the local police department in his acknowledgements, this one here is volunteering. Ellison agrees and sends him off to investigate the scenarios recorded on the tapes. 

But Ellison isn't doing well. He's drinking heavily, and his obsession with the tapes grows. Based on the children's drawings, he's able to locate "Mr. Boogie" in several videos, and the figure actually moves on the screen, even when it's paused. By the next day, Deputy So-and-So (he never gets an actual name) discovers each of the families on the tapes had lived in a previous house where one of the mass murders were committed. 

Then, even spookier things begin happening. Trevor has another horrific night terror. Ellison is attacked by a huge Rottweiler. And behind him, we see five ghost children standing menacingly in a row. Tracy finally understands the urgency of the situation and wants to leave immediately, but Ellison desperately needs to figure out the story.

While the deputy is chuffed to be part of a project helmed by one of his favorite writers, he's growing increasingly concerned that Ellison's paranoia might be stemming from the bottles of whiskey around the house, as well as a lack of sleep. He also points out that they're sleeping in an actual crime scene. This isn't a healthy place to be. But Ellison insists he doesn't believe in the supernatural, even though he clearly believes in the monster in the videos. Tracy also finally finds out that their own house is the one Trevor drew in his school picture of the murder tree. And now, Ashley is also drawing these dead figures around the house. Tracy pleads with Ellison that his family and his children are his legacy, not these books, but Ellison won't be swayed away from his project. 

When he wakes up again in the middle of the night to hear his locked-up projector running in the attic, Ellison goes to investigate. That's when the five ghost children, along with Bughuul, jump out at him, causing another huge fall from the attic. Ellison finally realizes this is all wrong, and the danger is real. He burns all the films in the backyard and wakes up his family, saying, "We have to leave here. ... We have to leave now!" They take nothing but essentials as Ellison speeds away from the town. They get pulled over by the sheriff, but when he finds out they're leaving permanently and that Ellison has scrapped his book entirely, he lets them go with a warning to never come back. They never will ... but not by choice.

With tears in his eyes and a steely resolve, Ellison watches the extended cuts of the terrible home movies. He discovers that the missing children weren't kidnapped at all. In fact, each missing child was the one who murdered their whole family before joining Bughuul's demented cohort. Ellison suddenly feels sick, and we think it's because of what he saw on the tapes, but when he starts foaming at the mouth, we realize he's been poisoned ... by his daughter, Ashley. "I like that you made the movies longer, it's better that way," Ashley says, hiding an axe. "Don't worry, Daddy, I'll make you famous again," are her chilling final words.  

Ashley goes on to dismember her family off-screen, painting the house walls with their blood in dramatic sweeps that only Dexter Morgan could appreciate. Ashley adds the drawing of her murdered family to the lid of the film box, situating Mr. Boogie off to the side. The ghost children appear and then scatter when Bughuul's menacing form arrives, picking up Ashley and taking her into the celluloid of the Super 8 film. Ashley's canister is now in the box, labeled "House Painting." The film's final jump scare is courtesy of Bughuul, who pops up to make everyone scream one last time before the credits unfold to outline Bughuul's back story through occult images and more Super 8 footage.

Sinister is about Ellison Oswalt's own personal darkness as much as it is about a child-eating demon who encourages kids to murder their families. We watch him fully devolve into his obsession, even as he knows it's getting fundamentally more dangerous for him and his family. And because the story follows Ellison's point of view closely, neither he nor the audience see what's happening to his daughter in the meantime. His substance abuse issues increase as the drama of the story reaches its terrible pinnacle, and we almost think he could've imagined the whole thing. Sadly, that doesn't turn out to be the case, and the Oswalts end the film as yet another tragedy in Bughuul's wake. Ellison's obsession gets his entire family killed in a truly heinous way, as with all the others. 

While Sinister is fiction, in real life, we have seen a version of what happens to Ellison in the late Michelle McNamara's book and documentary series I'll Be Gone in the Dark, which is about the Golden State Killer. McNamara actually helped catch the killer after decades of him being on the loose. She also dove too deep into the search for a serial rapist and murderer, and her self-medicating to cope with the stress of what she was constantly reading tragically ended in an accidental overdose. Both obsession and diving too deep into the world of murder is a dangerous business, emotionally and psychologically, and as both Sinister and real life show, it can be deadly.