The plot opens with a small fictional village named Chitharpatti, where a temple of Chitheswarar (also pronounced as Sitheshwarar) attracts a large number of devotees thanks to its legend as well as its purported power to heal any known or unknown disease.
An ashram adjacent to the temple, headed by Oomaisaamy (Charuhasan) is also a popular name, as it cures literally any physically or mentally ill patient.
At this juncture, Dr. KR (Delhi Ganesh)—once a great psychiatrist, but now intellectually disabled—strays into the village, and is admitted to Oomaisaamy's ashram by Mani.
He had been regarded as one of the best psychiatrists of India, and an Indian Central Minister admits his intellectually disabled son to his hospital for treatment.
Enraged by this, the Minister ridicules Dr. KR and moves his son away to Oomaisaamy's ashram after hearing other people speak so highly about it.
What Dr. KR does not know, is that he was unable to cure the Minister's son not because of his incompetency, but because of a sinister scheme laid out by his junior, Dr. Vishwaram (Mohan V. Ram).
As Dr. KR acts as a retard and tries to uncover Chitharpatti's mystery, he stumbles upon a greater truth about what might be going on inside the temple during the dark.
He finds out that the two men enter the temple with trained dogs searching for Navabhashana lingams, of which, he learns, they have six already and are trying to locate the remaining three.
Vaithiyar (Kavithalaya Krishnan), Mani's best friend in the village, turns out to be the man behind these killings inside the temple.
Also in various stages of the plot, the significance of these lingams, values of ancient Hindu scriptures are brought out, which makes the viewer intrigued until the last scene.
The story examines the psychological underpinnings of the concept of split personalities even while exploring in detail the rural cult of Karuppu Sami prevalent in the southern part of Tamil Nadu.
Starring C. T. Rajakantham, Chetan, Devadarshini, Meenakumari, Vijaya Sarathy, Master Lokesh, Mohan V. Ram, Poovilangu Mohan, Ponvannan, Sureshwar, Kausalya, Muthusubramanian and Sivakavitha, the series was a huge commercial success and triggered imitations and supernatural thrillers by other television directors.
While the first part revolved around the events of the Anaimudi Alampriyar household as seen through the eyes of the young Rajendran (played by Master Lokesh), the second part was mainly concerned with the customs, beliefs and traditions of the village and events unfolding in the Anaimudi Alampriyar household as seen through the eyes of the sceptical medical student Reena (Devadarshini) and her superstitious Chief Doctor, Nanda (Mohan V. Ram).
Every single one in the village had been looking for it, though some of the women try to avoid it extremely (thought that the gold is cursed due to the warth gained by Pechi).
Aanmai Udaiyar and Ratna's Uncle, Brahmman are the two people in the whole village putting in the greatest effort to find the gold.
Taking it as a challenge and to win over Karuppu Sami, to prove to the villagers that no such deity is around, Reena starts to uncover it too.
He finds his face on the book and takes it back to his hometown, implying that karuppu will return and will not rest until all evil is abolished in this town now.
His adoptive parents had a girl a few years later and Anwar, jealous of the affection shown on his sister, intentionally loses her in a crowded street.
Anwar recently arrests a dangerous criminal, Muniratna (Thalaivasal Vijay) who did 16 murders and had hidden a box of gold somewhere.
He is to be hanged in 2 days but Anwar gets to know from a Palmistry Astrologer, Bhaskar Das (Suresh Chakravarthy), that Muniratnam would not die and has a long life of 90 years.
Muniratnam escapes with the help of his men, in disguise as a Church Father, and hides in a poor Theater Operator, Lingam's house.
A lady doctor identifies the murder which was done by Varma Kalai and she informs CB-CID police officer / inspector Anwar (Poovilangu Mohan) about it.
Anwar starts to find the culprit with the help of News Tv9 Channel Reporter Charu Latha, who also got aware about the murder before it happens.
The whole murder is targeted to the people who are very close to S.V.S (Ravikumar) and Kumarasammy (Subalekha Sudhakar) in order to create shadow war between them.
However, S.V.S gets killed by Aasan and Kumarasammy came to the spot and they are arrested by police under the doubt, also M.P Ponnampalam (venu arvind) tries to give bail to them, which is rejected by Anwar.
In this tribal settlement, there exists a myth that the Kalpavriksham, the celestial tree that can grant any wish and desire of the person standing underneath it, is situated somewhere in the forest.
Siddharth, a student of Natarajan and an aspiring filmmaker, comes to the settlement along with Varsha a sound recordist to make a film on the forest and its wildlife.
Naga cited it was Balachander's son Kailasam who wanted him to direct when he initially assumed that he was roped in to handle cinematography.
[6] Naga cast different actors for Vidathu Karuppu since "the audience has to decipher everyone's character based on their background story.
[9] The first series of Marmadesam, Ragasiyam, was remade in Hindi with 2 seasons on Star Bharat under the name Kaal Bhairav Rahasya with significant changes in the storyline and was shot in Bhopal.