You could have a story where a person keeps having nightmares that start to come true. Or a town where everyone disappears one by one under mysterious circumstances.
One idea could be a haunted house where strange noises and apparitions keep appearing. Another could be a forest with a mysterious figure lurking in the shadows.
A girl finds an old, mysterious diary in the attic of her new home. As she starts reading it, she discovers that it was written by a girl who lived in the house decades ago. The diary reveals that the girl was into some dark magic and made a deal with an evil entity. Now, as the current girl reads the diary, she starts experiencing strange events. Things in her room move on their own, and she has nightmares of the entity from the diary coming to get her.
One idea could be a story about an old, abandoned house at the end of a dark lane. A young girl, curious about the rumors surrounding it, decides to enter. Once inside, she hears strange whispers and feels cold hands on her shoulders, but when she turns around, there's no one there. As she explores further, she discovers a locked room with a faint red glow seeping from under the door.
You could write about a man who inherits an antique mirror from his deceased grandmother. When he hangs it in his bedroom, he notices that there are strange reflections in it at night. The reflection shows a different version of his room, with dark, shadowy figures moving around. As he stares into the mirror more often, he starts to feel a presence trying to reach out from the other side, and he realizes that the mirror might be a portal to a haunted dimension.
One idea could be a story about a haunted mirror. A young girl moves into an old house and discovers a large, ornate mirror in the attic. Every time she looks into it, she sees a figure that gets closer and closer each day. Eventually, the figure steps out of the mirror.
A story about a cursed doll. A little girl finds an old, tattered doll in a thrift store. She takes it home, and strange things start to happen. Her toys start to move on their own, and she hears whispers at night. It's revealed that the doll was once owned by a witch, and now it's bringing bad luck to the girl's family.
A story about a haunted hospital. The main character is a nurse who has to work the night shift. She hears screams from empty rooms, and sees the apparition of a patient who died in a botched operation. The elevator moves on its own, stopping at the floor where the most tragic deaths occurred.
One idea could be a story about an old, abandoned house on the edge of town. Every Halloween night, strange noises come from it. A group of curious kids decide to go inside. Once inside, they find that the rooms seem to shift and change on their own. There are shadowy figures that lurk in the corners, and the air is freezing cold. As they try to find their way out, they realize they are being followed by something that makes a creepy scraping sound on the floor.
A haunted house where every room holds a different nightmare. For example, in one room, the walls bleed and the furniture moves on its own. In another, there are ghostly apparitions of long - dead residents. The protagonist must find a way to escape the house before it consumes them completely.
How about a story based on a cursed object? For example, a beautiful antique mirror. Everyone who looks into it sees a distorted version of themselves, and soon they start having nightmares. Then, they notice that their appearance in real life is slowly changing to match the distorted reflection. The mirror has a dark past and was used in some sort of evil ritual.
One idea could be a story about an old, abandoned asylum. A group of friends decides to explore it on Halloween night. As they walk through the dark and decrepit hallways, they start to hear strange whispers. Then, they see shadowy figures that seem to follow them. Suddenly, one of them gets separated from the group and when the others find him, he has a blank stare and is acting very strangely, as if something has taken over his mind.