This is a possible summary:
The text contains two mystery stories that are based on true events. The first story is about Dewi and Eka, two college students who rent a haunted house where a missing female student was murdered and hidden behind a wall. They encounter the ghost of the victim who leads them to discover the body and report it to the police. The second story is about Slamet and his family who move to a village because of the economic crisis. They live in a house that has a ritual of gubrah, which requires annual renovation or else the keeper of the house will demand a sacrifice. Slamet's son Angga becomes the target of the keeper and falls into a coma. They call an ustad to help them get rid of the creature and renovate the house. They also find out that the house has many other victims who were buried in the backyard. A pastor helps them to dig up the bodies and bury them properly. However, they are unaware that the woman who owns the house is behind everything and plans to harm them again.
Here are the key facts from the text:
1. Dewi and Eka are students new to a university.
2. Eka remembers her sister's warning message.
3. They clean their new, long-unoccupied contact house.
4. Eka finds black spots on the wall that can't be cleaned.
5. They cover the dirty walls with wallpaper.
6. One night, Eka hears noises and thinks it's Dewi, but no one is home.
7. Dewi comes home late after being out with a friend.
8. Eka recalls her sister's message about the house being haunted.
9. Dewi learns from Mischa that their house is rumored to be haunted.
10. Mischa tells Dewi about a missing student who used to live in their house.
11. Eka hears strange noises and finds Dewi crying at her desk.
12. They discover a skull behind the wall after seeing an apparition of a woman.
13. The police find evidence to arrest a suspect related to the missing student.
14. The story is based on true events from the 1990s.
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