Trama

A couple of revenge seeking ghosts haunts an innocent man, and the people surrounding him, to get justice for their murders.

Raghava (Lawrence) who always fear to watch horror movies, takes his mom (Kovai Sarala) to the toilet as he has Nyctophobia and whenever he feels the extreme shock, he sits on the lap of woman next to him. Raghava is a cinematographer for a TV channel and he loves Nandhini (Taapsee) who wants to shoot a fake ghost-haunted house so that the TRP rating will increase. To their misfortune, they actually get haunted by not one but five ghosts.—Rajan

Raghava is a cameraman for the channel Green TV where his crush Nandini also works. When Green TV drops down to the second position in the ratings, Nandini advises shooting a horror program to bring their channel back to the first position. After the board members agree on this plan, Nandini decides on a location with a house with an intense haunted look, without knowing the fact that it is actually haunted. She sets out with Raghava, his watchman Mayil, Dr Prasad, and the show's anchor Pooja to complete the task.

While shooting on a nearby beach, Nandini discovers a Thali and after the discovery, mysterious events start taking place and she decides to visit a priest. The priest discovers that the Thali is actually haunted, lets Nandini out of his room, and returns the Thali to the spirit. Nandini does not seem to believe it, and the priest challenges her to check the place where she had taken it from. After Nandini and Pooja disturb the Thali for a second time, it does not leave them. She rushes to the priest and helps her. As instructed by him, she prepares a coffin and a groomed woman's corpse which has the Thali. They move to a distance and shoot to see that the coffin literally breaks open and the dead woman is dragged by the ghost.

All the members escape out of fear and Raghava collapses. The priest is also killed and Nandini becomes possessed by the ghost. Raghava and Nandini move into another house, where the haunted Nandini is planning something, and to their surprise, Raghava's mother, and Nandini's sister-in-law also come to stay there. Several changes occur in Nandini which only Raghava notices at first; she starts smoking at night and even thrashes him. Soon, the family realise that she is possessed. Nandini (now possessed as Ganga) influences Shiva's ghost, to be sent into Raghava. When Raghava's mother and Nandini's sister-in-law return, they are beaten up. They retreat to a church and learn about Shiva and Ganga.

Past: Ganga is handicapped, but Shiva loves her. Unfortunately, Marudhu killed and buried them when Ganga refused to marry his insane son Shankar. Marudhu also killed Shiva and Ganga's family and made Shiva's best friend insane. Before dying, Shiva killed Shankar.

Present: When Raghava (possessed by Shiva) killed Marudhu's brother, Marudhu learns that a spirit killed him, and gets a tantrik to revive a dead Shankar to kill Shiva and Ganga. Shiva battles Shankar and eventually defeats him. Ganga takes her revenge by killing Marudhu. Shiva returns Raghava safely to his family and promises to return whenever they needed him. The story of Shiva and Ganga restores Green TV back to the first position.