Once there was a witch) is a 2013 Indian Hindi-language supernatural horror thriller film directed by Kannan Iyer, adapted from the short story Mobius Trips by Mukul Sharma.

[3] The film stars Emraan Hashmi, Huma Qureshi, Konkona Sen Sharma and Kalki Koechlin.

[5] Konkona Sen Sharma received critical acclaim for her performance and was nominated for Best Supporting Actress at the 59th Filmfare Awards.

One day, he gets drawn to his old and vacant family apartment, where he opens the lid of a treasure chest, only to see a vision of Misha dead inside.

He finally seeks psychiatric help from the odd Dr. Palit, who puts him under regression hypnosis to go back to the past, when Bobo was 11 and Misha was 6.

One day, Bobo reads a book about witchcraft, where he discovers the number 666 and uses it to travel on the elevator to an unlisted floor at the bottom of the building, which he tells Misha is the entrance to hell.

One day, a woman named Diana moves into their building, and Bobo is convinced that she is a daayan who surfaced following his and Misha's trip on the elevator.

As she performs the rest of her ritual, the distraught Bobo finds his father's dagger and cuts off Diana's plait, destroying her source of power.

She produced a mini-series aired on the channel Life OK titled Ek Thhi Naayka starring the top actress of Indian Television from her path-breaking shows, including Smriti Irani, Sakshi Tanwar, Shweta Tiwari, Aamna Shariff, Mouli Ganguly, Ankita Lokhande, Kritika Kamra and Pooja Gaur.

"[10] The film received a mainly positive response with praise particularly for Konkona Sen Sharma, as well as Huma Qureshi and Kalki Koechlin.

[11] Taran Adarsh of Bollywood Hungama gave Ek Thi Daayan 4.3 stars out of 5 and called it "An imaginative and appealing supernatural thriller".

[12] Meena Iyer of The Times of India awarded it 3.5 out of 5 while remarking "Woven beautifully between the world of magic, occult and suspense, Ek Thi Daayan, makes for compulsive viewing, providing some spine-chilling thrills at short gaps".

[13] Raja Sen of Rediff gave it 3 out of 5 star, noting,"Ek Thi Daayan isn't the scariest of horror films.