The Room Below Ending Explained: What Happens to Simon and Henry?

The Room Below begins as a story about grief, but Kurt Martin’s film gradually turns that grief into something far more dangerous. Mia Levine has spent a decade unable to recover from the death of her son Axel, and when Simon enters her life, she convinces herself that she has been given another chance at motherhood. What initially looks like a disturbed woman making one terrible decision becomes much darker by the final act, when the film suggests Simon is not the first child Mia has tried to turn into Axel.

Alyssa Sutherland’s Mia does not simply want to keep Simon hidden in her basement. She wants to reconstruct the life she lost, complete with a son who behaves the way she wants, a family around him and even the illness that defined Axel’s final days. By the ending, Simon’s disappearance, John Perkins’ missing son Henry, the death of Simon’s father and the creature inside Mia’s home all become pieces of the same disturbing picture.

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Why Does Mia Kidnap Simon?

Ten years before the main events, Mia loses Axel to cancer. What torments her is not only his death, but the fact that she was not with him at the end. Years later, now a children’s author and expecting another baby, she is still seeing Axel in other children and admits during a grief-support meeting that she knows those visions are not real.

Simon attracts her attention because he resembles Axel, but Mia also discovers that he is being abused by his father. His injured back gives her an excuse to take care of him, and Simon’s absent mother makes it easier for Mia to imagine herself filling that role. She drugs him, brings him into her home and eventually locks him inside the bedroom below the house, a room that has effectively been prepared as a replacement version of Axel’s world.

Mia initially continues calling him Simon, but the distinction begins disappearing as her delusion deepens. She starts calling him Axel, talks about becoming his mother and insists that he will eventually want to stay with her. Simon realizes that reasoning with Mia will not work, so he begins pretending to cooperate while looking for an opportunity to escape.

Did Mia Kill Simon’s Father?

The film never gives Mia an explicit confession, but it leaves very little doubt about what happened to Simon’s father, William Cooper. While Simon is imprisoned, John investigates the disappearance and learns that William has died from poisoning, officially treated as a suicide. Mia already knows that Simon’s father is dead before Simon does, and later John becomes suspicious of how she knew where William lived in the first place.

When John finally confronts Mia, he directly raises William’s poisoning. Mia avoids answering him and treats the death with chilling indifference rather than surprise. The implication is that she poisoned William because he was the last person with a parental claim over Simon and therefore an obstacle to the substitute family she was trying to create.

It also changes how Mia’s early concern for Simon should be viewed. William really is abusive, but Mia is not rescuing Simon from that environment so he can be safe. She removes William so there is nobody left to take Simon away from her.

Why Does Mia Lose Her Baby?

Simon eventually manages to gain enough of Mia’s trust to get upstairs, but the escape does not go according to plan. The creature haunting the house becomes involved in the chaos, and Mia suffers a serious fall. She survives, but the injuries cause her to lose the child she was carrying, and the doctor tells her that the pelvic damage means she will not be able to have another child.

The miscarriage removes the final possibility of Mia creating a new family naturally. Instead of forcing her to confront what she has done to Simon, it drives her even deeper into her fantasy. When someone questions how casually she talks about losing the baby, Mia insists that miscarriages happen and behaves as though she has already moved past it.

That reaction makes sense only because, in Mia’s mind, she has already found another son. Simon has stopped being a kidnapped child to her and has become Axel’s replacement.

Why Does Mia Give Simon Chemotherapy?

After the miscarriage, Mia’s delusion takes its most disturbing turn. She no longer merely dresses Simon like Axel or insists on calling him by Axel’s name. She begins recreating Axel’s cancer treatment, telling Simon that they have started chemotherapy early and that she will not allow the disease to take him.

Simon does not have cancer. Mia is forcing him through her memory of Axel’s illness because she is no longer trying simply to replace her son with another boy. She is recreating the entire relationship, including the suffering that ended it.

This also explains why saving Simon emotionally was never going to be enough for Mia. Her identity has become inseparable from being Axel’s grieving mother. If Simon becomes Axel, then he must also become the sick child she remembers caring for, allowing Mia to replay the past while imagining that this time she will remain beside him until the end.

What Happened to John’s Son Henry?

The biggest late twist concerns John Perkins. John befriends Mia through the support group because he also lost a child, although Henry did not die from illness. He disappeared, and John’s obsession with finding him eventually destroyed his career as a detective and left him unable to move forward.

Earlier, John remembers taking Henry to one of Mia’s book signings years ago. Mia claims to remember the boy, and at first the encounter seems included only to deepen the connection between two grieving parents. The ending turns that memory into something much more sinister.

As John closes in on the truth, the movie reveals that Mia’s involvement with Henry went beyond meeting him at that signing. A flashback shows the child resisting Mia as she calls him Axel, with the boy insisting that his name is Henry. The sequence indicates that Mia had previously tried to do to Henry what she is now doing to Simon: take another child and force him into Axel’s identity.

The film does not spell out every detail of what ultimately happened to Henry, nor does it provide a neat explanation of where his body went. What matters to the twist is that John’s search has unknowingly brought him close to the person connected to his son’s disappearance. Mia has been listening to John’s grief while knowing far more about Henry than she ever admitted.

Simon, importantly, is not being revealed as Henry. The Henry material belongs to the earlier events surrounding John’s son and establishes a pattern in Mia’s behavior. Simon is another child caught in the same cycle.

Why Does Mia Want John to Stay With Her?

Once John knows too much, Mia attempts another transformation of reality rather than acknowledging it. She imagines that John can become part of the family she is constructing and tells him that they could have a life together and raise the boy as their own.

That proposal explains why Mia does not immediately try to get rid of John when he becomes suspicious. John is another grieving parent who cannot release the past, and Mia believes that makes him compatible with her. In her fantasy, Simon can replace both Axel and Henry, while she and John become the parents of the family neither of them has anymore.

John, however, finally understands that Mia’s version of healing is simply another form of captivity. His grief kept him searching for Henry, but Mia has turned hers into an excuse to steal other people’s children.

Does John Save Simon?

John eventually gets into the room below and finds Simon alive. For a brief moment, it appears that the investigation has finally reached its conclusion and Simon is about to be rescued, but Mia attacks before John can get him out.

The film does not give John a reassuring survival scene afterward. He is badly incapacitated during the confrontation, and nothing in the final stretch suggests that he manages to leave the house or contact the police. The important outcome is that his rescue attempt fails, leaving Simon alone with Mia again.

Mia then takes out a saw and threatens Simon in horrifyingly practical terms. She tells him that sometimes a mother has to stop her child from hurting himself, effectively threatening to mutilate him so he can no longer try to escape. Simon finally agrees to behave, which stops the immediate threat but leaves him completely under Mia’s control.

Does Simon Escape in The Room Below?

No. Simon is still Mia’s prisoner when The Room Below ends. After threatening him with the saw, Mia continues administering her version of Axel’s treatment, assuring him that he is close to finishing and needs only one more round before she can check whether the “cancer” is gone.

By this point, Simon understands that resistance can bring even worse punishment. His situation has therefore changed from physical imprisonment to something even more frightening, because Mia is gradually forcing him to participate in her fantasy simply to survive.

The closing moments make the outcome even darker. Mia receives a call praising her new children’s book and asking where she found the inspiration for it. Instead of being exposed for Simon’s disappearance, she has turned the experience into the creative breakthrough her career needed.

The final reference to Simon’s love of oysters brings the film back to their first meeting. Oysters were one of the small details through which Mia initially gained his trust, but by the end they have become a reminder of how completely she has absorbed the real Simon into the fictional child she is creating. He is alive, but Mia has no intention of returning him to his old life.

What Is the Creature in Mia’s House?

The Room Below never gives the creature a conventional origin story, and that appears deliberate. Official descriptions treat it as a creature living inside Mia’s home, but the film repeatedly connects its appearances to her deteriorating mental state, guilt and hallucinations. Critics have similarly interpreted it less as a straightforward monster and more as a manifestation of the darkness Mia continually feeds rather than confronts.

Mia even acknowledges earlier that she sees things that are not really there and sometimes imagines characters from her books coming to life. That makes the creature’s most convincing function psychological: it represents the grief, guilt and compulsions she keeps nurturing. The more Mia refuses to accept Axel’s death, the stronger the thing inside her home appears to become.

The movie deliberately stops short of declaring that every appearance of the creature is imaginary. What it makes clear is that defeating the creature would never solve the real problem, because Mia herself is responsible for Simon’s captivity, William’s likely poisoning and the cycle that previously consumed Henry.

What Does The Room Below Ending Mean?

The ending denies the conventional version of closure that John has spent the film searching for. Henry’s disappearance is finally connected back to Mia, but learning the truth does not save Simon, and Mia is not arrested or forced to confront what she has done. Instead, she ends the film with Simon still in her control and her professional life unexpectedly revived.

That is what makes the final book deal particularly cruel. Mia turns trauma into children’s stories, but she does not transform or overcome that trauma herself. She simply finds another child, creates another version of Axel and begins the cycle again.

The room below is therefore more than the physical place where Simon is held. It is the part of Mia’s life where everything she refuses to accept has been stored: Axel’s death, Henry’s disappearance, her guilt, the creature and eventually Simon himself. By the time the film ends, Mia has not escaped that room psychologically. She has simply dragged another child inside with her.