The title you mentioned refers to the 2002 Bollywood supernatural thriller

Raaz is a 2002 Indian supernatural thriller film directed by Vikram Bhatt. The movie stars Ajay Devgn, Pooja Bhatt, and Ashutosh Rana in leading roles. The film's plot revolves around a couple, Aditya (Ajay Devgn) and Manisha (Pooja Bhatt), who shift to a new home in Ooty. They start experiencing strange and unexplained events, which lead them to believe that their house is haunted.

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Origins: The story is partially inspired by the Hollywood film What Lies Beneath and real-life paranormal experiences shared by producer Mahesh Bhatt.