Terrified (Aterrados) premiered quietly on Shudder and landed on many top 10 lists for 2018 (including mine!). Since then it has evolved a small cult following with many scratching their heads. It's a truly scary film that deserves wider acclaim and to that end, I have watched it repeatedly and have the following explanation of the confusing film. Obviously, the following is filled with MAJOR SPOILERS, so watch the movie then come back here.
THE STRUCTURE
The film has an oddly non-linear first half and a linear second half. The plot jumps around in time and is missing some interstitial scenes to pave a clear path. There's also many characters with minimal development and locations to keep track off. Two characters even have a similar appearance: tall, tousled hair, dark deep-set eyes, and beards. And there's a steady, non-stop pace that doesn't give you periods of rest to reflect. All this causes disorientation and unease, on top of the mounting dread and creepy visuals. By the time the true horror is unleashed, the viewer is quite discombobulated and helpless.
THE SETTING
The story takes place in and around three homes and what appears to be a hospital. The homes are nondescript and colored similarly so its difficult to tell them apart. There are many characters to keep straight and you will know none of them well. There are three main locations for the events of the film: Walter's house, Juan's house next door and Alicia's house across the street.
THE STORY (Explained linearly instead of how it was shown in the film)
Walter's house has been haunted for several months for unknown reasons and the activity is escalating. At first furniture moves or shakes. He is not sleeping and has spoken to several people, presumably doctors and then perhaps clergy, and is eventually directly to Dr. Albreck. Her assistant says she only investigates cases with physical proof, so he sets up a video camera to document the activity. He sees creatures that enter his bedroom via an armoire or from beneath his bed. Presumably he sends her the footage.
Meanwhile his next door neighbor, Juan, complains about their adjoining wall being cracked in half. Walter says he is remodeling and that's the reason for the loud noises and bangs. That night Walter is again visited by the creatures and he screams, presumably finally captured by the creatures.
The next morning, Niño, Alicia's son from across the street, drinks water from a spigot at Walter’s house. Walter's glowing eyes appear in the window and he tells the boy to get as far from the house as possible. He does and backs up into the street, getting hit by a bus. A funeral happens off screen and is attended by Juan, his girlfriend Clara, and Funes, a cop who used to date Alicia.
Meanwhile, Clara then begins hearing noises emanating from the sink in her home. Juan is awaken in the middle of the night by loud banging to find Clara being violently smashed into the walls by an unseen figure as he watches in horror unable to stop it. He is presumably taken to a psychiatric hospital.
After the funeral, Alicia starts hearing noises in the pipes. Off screen, her dead son then climbs out his grave and ends up sitting at the kitchen table.A routine police patrol finds Alicia's front door open, they go inside and discover the boy's body. The detective Funes is called to the scene, and then Funes calls Jano, a former forensics expert and writer, for help. The boy sits frozen motionless, but when Jano turns off the lights, Niño corpse moves spilling a glass of milk.
It's no early next morning, Jano sees Dr. Albreck taking pictures outside of Walter's house across the street. He knows her from the paranormal conferences she's presented at. Albreck asks about Walter's whereabouts. Jano takes her over to Alicia's house to see the boy's corpse. While telling her stories of times dead corpses moved or talked to him, like he wrote in his book, Niño moves again, so they pick him up and put hims a freezer outside. When Funes gets there, the boy cries and bangs against the lid. They make a plan to rebury the body and cover the tomb with cement.
Albreck & Jano are joined by Rosentock who visit Juan at the hospital. They tell him of a very similar case in 1998 and do not believe Juan was responsible for the death of his girlfriend. They ask for permission to enter Juan's house, and prepare to investigate the paranormal events at the three houses: Alicia's, Walter's and Juan's.
From here the plot moves linearly. Each investigates a separate house, setting up instruments, taking photos and discovering various anomalies. Rosentock tells Funes that fear is contagious and it is not the place for someone who has health issues like Funes has. Rosentock then discovers a magnetic field in the kitchen, a knife pierces Rosentock’s hand and is pinned to a cupboard. Something unseen inside the cupboard seems to be sucking his blood.
Rosentock is explains to Funes that time is different inside the nest, or epicenter, of this paranormal disturbance. It looks like there is a strong magnetic fields that causes furniture and decor to be pulled against walls. Rosentock tells him to clean up the blood quickly. Funes is increasingly agitated and calls Jano. Jano looking at Funes from across the street says there's a figure standing next to Funes. The figure suddenly teleports to Jano and a struggle can be briefly heard.
Albreck continues to fuss with a contraption that seems to be measuring shifting magnetic fields and hears gurgling at the kitchen sink, and then at a large, dark crack on the wall. She moves closer to it to examine it.
Back at Walter's house, Funes is about to leave when Rosentock says he found "him". He madly explains that dimensions of darkness and light are coexisting on the same plane at the same time, so you can only see the creatures from certain perspectives. Funes runs in terror to find Jano. Rosentock calls Albreck to tell her this is what they have been looking for, but don't know what to do about it other than document it.
Funes runs in terror to find Jano who is screaming from within a glass filled cabinet, seemingly trapped in some inner dimension of the furniture screaming that he has shards of glass in his eyes.
Funes goes to see Albreck who is sitting at the crack in wall which sounds cavernous. Inside is a crouched figure with two peering eyes. Albreck tells Funes to clean his hands since the creatures thrive on blood. She explains that they have theory that dimensions are like segments of an orange, each with their own beings and physics. Somehow one world crossed into the next. Water is their conduit. They can reproduce and travel in water at a microscopic level, and since humans are also made of water they can use us as conduits. Suddenly a hand reaches out from the crack and breaks her neck. Funes has a heart attack, falls to the floor, and a misshapen creature emerges from the wall moving towards him. Back at Walter's house, the same being that took Walter appears to take Rosentock.
Funes awakens and he is alone. Alicia suddenly appears in the doorway, and he begs her to take him to a hospital. She angry at him for taking her boy away and burying him again with a concrete slab over him. She helps him up and out, and the go to her car. Niño is in the back seat. Funes backs away and goes to his own car, and suddenly, the corpse of Albreck runs toward his car, and tell hims to help them, that there is still time, and they are being tortured. Funes speeds away.
Now away from the house, Funes pulls over and has a smoke, his heart attack seemingly subsided. Another cop radios-in saying he’s at the house and Funes is nowhere to be seen. Funes orders him to leave the premises immediately. Funes drives back to the house and pours gasoline over Alicia's house. Niño is back in his room, and Alicia has hung herself from a doorway. Funes trails the gasoline outside and tries to light a match but it keeps being blown out. The camera swings around to reveal Jano who is blowing the match out. Funes fires his gun and successfully burns the house down with Alicia & Niño.
Back at the psychiatric hospital, three new cops, one who witnessed Funes burn down the house, question Juan if he’s heard from the paranormal investigators or Funes. Everyone we’ve seen so far has gone missing. Juan says no but asks who the guy sitting at the back of the room is. He says it looks like Rosentock but with a burned face. The policeman turnaround and see nothing then suddenly a chair moves, is picked up and is thrown at them.
THE CONCLUSION
At the end, it's clear the area of influence has spread beyond the three houses where it started. We don't know what caused this or how it came about but the Albreck and Rosentock had been studying coexisting dimension sor parallel universes. The paranormal here is treated almost as a contagion that’s spread from person to person, through water, or through proximity to the epicenter. The contagion slowly spreads from the residential neighborhood to wherever the hospital is, presumably attached to anyone who traveled into the affected zone. This happened before in 1998 according to Albreck and Rosentock, and then questioned, Juan seemed to recognize the bloody woman in the photo. Juan was at the epicenter, drank water, and is the only one not directly affected by the creatures. I feel he is somehow culpable in having started all of this, hence the chair thrown at him by what may have been Rosentock. A prequel is definitely set up, as well as sequel to the events that followed these. Will get more of the story from writer/director Demián Rugna?!?