Thirty Places by Author Mohammad

The story begins when Maria Louisman discovers an old cassette tape in a university library. It features the haunting voice of her late grandfather, whispering a cryptic warning:
"Thirty places, ten people. Never let them count you twice."
Drawn by a faded photograph and a diary entry, Maria and nine of her friends venture to an abandoned institution outside the city—a place bearing a rusted sign that reads THIRTY PLACES. Unbeknownst to them, the building was once a private memory clinic run by Maria's grandfather in 1996, where patients' painful memories were extracted and stored.
As the group explores the increasingly impossible rooms, the line between reality and the past begins to dissolve. The building doesn't just trap people—it consumes their memories, causing friends to vanish one by one while erasing them entirely from the minds of those left behind.