Bejoy "Bobo" Charan Mathur is India's top magician, but, unknown to everyone, his life is falling apart. Hallucinations about his dead little sister, Misha, threaten his sanity. 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.
It is revealed that Bobo and Misha lived with their single father in their apartment. 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. According to Bobo, each building has its own hell, where the "bad people" of the building are consigned for eternity once they are dead. 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.
Diana charms Bobo's father and marries him. Bobo then learns that a daayan's source of power is her plait. On Diana's birthday, during the night of the red moon, she sacrifices Misha to restore her dark powers. Bobo and his father discover Misha's corpse inside the trunk and a now-undisguised Diana hovering over her body. Diana kills Bobo's father with her ear-piercing screams. 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. Diana begins to crumble into dust, but she tells him that she will return.
Dr. Palit dismisses Bobo's visions as fantasy. Bobo and Tamara marry and adopt ten-year-old Zubin. Everything goes well until the irresistible Lisa Dutt enters their lives during a magic show. Everyone loves her, but Bobo suspects that the witch is back in the form of Lisa. Lisa buys Bobo's old apartment, adding to his suspicion. During Lisa's housewarming party, Tamara falls off the balcony and is hospitalized. Lisa visits her, but Bobo walks in and angrily tells her to get out when he finds her tinkering with the IV bag. Afraid for his family, he calls Dr. Palit for help.
Dr. Palit finds out something disturbing and calls Bobo, but the witch appears as Diana and kills him. Bobo finds Dr. Palit dead and sees a paper in his hand, on which Zubin's name is written. He looks for Zubin everywhere but finds him missing. He then rushes back to the old apartment and takes the elevator to hell.
There, he finds Zubin lying on an altar and the witch ready to sacrifice his son's life to sustain her powers. Bobo tries to save Zubin but encounters Tamara. In a twist, it is revealed that Tamara is the witch, not Lisa. Diana appears and tells him that he is a Pishacha, because no average person who pushes a button in an elevator finds hell. Tamara tells him that it took her twenty years to be reborn and she will not let him kill her again, and she knocks him unconscious.
Bobo wakes up and remembers the book where he read that a Pishacha can regain his strength on the night of a red moon, and today is the night of the red moon. With his newly acquired powers, he kills Tamara and returns his powers to Satan. The witch, now in the form of Diana, reveals that only an innocent person can kill a witch, and since Bobo killed her once before, he is no longer innocent. The two fight again until Bobo kicks the sacrificial dagger at Zubin. Zubin then manages to cut off Diana's plait, but the crumbling witch promises that she will return again.
In the end, Bobo meets Lisa, and she asks him why he was so aggressive towards her in the beginning. Bobo tells her that he thought she was a witch.
The film was shot at Filmcity. According to director Kannan Iyer, leopards entered the sets during shooting. The uninvited guest was later apparently shooed away.[7]
CGI VFX for the film has been done by “Prana Studios””Mumbai.
The music of Ek Thi Daayan was composed by Vishal Bhardwaj, with lyrics written by Gulzar.[9] The background score was composed by Clinton Cerejo. Musicperk.com rated the album 7/10 quoting "This album does impress in parts but fails to make a lasting impression."[10]
The film received a mainly positive response with praise particularly for Konkona Sen Sharma, as well as Huma Qureshi and Kalki Koechlin. On the review aggregator website Rotten Tomatoes, 80% of 5 critics' reviews are positive.[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. It is, though, smartly crafted, highly original in its approach and a strikingly ambitious effort for the genre".[14]
Box office
Ek Thi Daayan opened at around 30-40% occupancy with better opening in multiplexes rather than single screens[15] where it collected around ₹6.24 crore (US$730,000) on its first day.[16] The film did not show any growth further and netted around ₹15.5 crore (US$1.8 million) over the weekend.[17] Despite low growth over the weekend, the film came out with good total of around ₹ 25 crore in its first week.[18]Ek Thi Daayan grossed over ₹40.25 crore (US$4.7 million) during its entire theatrical run.[2]