Dark) is a 2019 Indian supernatural horror film written and directed by V. Z. Durai.

[1] The film had its theatrical release on 6 December 2019 and opened to generally mixed-to-positive reviews.

All the victims' neck bones have been shattered but there are no signs of a handprint or murder weapon.

When Constable Kulandaisamy arrives at the SP Office, he finds a woman trying to immolate herself.

Police officer Chezhiyan (Sundar C) along with his wife Regina (Sakshi Choudhary) and daughter Diya (Manasvi Kottachi), relocate to the hill station.

Chezhiyan notes all of the windows and furniture are made entirely of steel; Kulandaisamy states this is because wooden items were all destroyed by termites.

As Regina starts preparing a meal, she hears a tapping noise and scolds Diya to stop making it.

He learns the phone had been out of order for the past two days and discusses the incident with his colleagues.

Regina tries to sleep but Diya stands at the end of the bed, jumping on her and biting off her neck.

Kulandaisamy also states an Arabic magic practitioner lives alone atop of the hill and is often seen with the ragged old man.

He answers it and finds Regina left early from home to drop the child at school and go shopping.

Hysterical, Regina calls Cheziyan to tell him Diya is petrified and has odd rashes on her body, and demands he go to the hospital right then.

As the doctor treats her, she gets a call from home and attends it, only to hear the hysterical voice of Regina relating Diya's rashes when she is standing in front of him.

While Regina puts Diya to bed and changes clothes, Sila watches them, roams the house and sniffs Cheziyan's scent.

Cheziyan while investigating the forensic photos, finds a weird scratch that reads "16:113" on the magician's body.

Cheziyan narrows down his suspect from the list of people with this rare blood group to a woman who has unusually signed in Arabic.

A Gujarati women was one of the Silas who vowed to bring all her sisters back to human form by killing her unborn child and Diya to gain ultimate power.

Director V. Z. Durai announced Iruttu, his seventh effort, after the release of Yemaali in 2018.

[4] The director hired actor-director Sundar C as the male lead while C was directing Vantha Rajavathaan Varuven.