The Secret of Chidambaram) is an Indian Tamil-language suspense series directed by Naga and produced by Anil Mishr and P.K.
The story revolves around a young journalist Somu, working for Neithal Magazine in Chennai.
Kumaraguru has a daughter, named Thulasi, who is seen acting differently and making origami.
Somu and his friend Padmarajan go around Chennai, interviewing people, on a title of previous birth.
The accident claimed a young man's life and a water tanker lorry was the cause of it.
To avenge his anger, Somu tarnishes all tanker lorries around Chennai for their reckless driving.
Aarthi, a young girl working in Chennai Meteorological Department, is Somu's childhood friend.
Aarthi deduces that Somu would get angry at 4 pm the next day, and sure enough he does as his article about the tanker lorry is not published as expected.
Nadi Josiyam is a type of method to find our future through astrology, with the help of the person's thumb impression and some palm-leaf manuscripts.
Akash has a strong American accent, which makes his Tamil sound very different.
AC Adiyapatham investigates all these cases, including Tamil Vathiyar's, and starts suspecting Somu, as he is seen at all crime scenes.
When he confines in his grandmother, he realizes that he has no relatives named Someshwaran and that there is only one retarded 10-year-old boy called Somu, in that street.
His grandmother then hides the manuscript but Abhirami gives it to him secretly and he leaves for Chennai.
Meanwhile, Thillairajan blindly starts trusting an astrologer who tells him that he would not see Aarthi again.
Aarthi, in the name of helping Somu, escapes from her home, only to be kidnapped by an unknown person.
Aarthi is injected with the blood of an AIDs patient, and her health starts deteriorating due to the HIV Virus.
Somu finds out that a guy, who has a white scar on the back of his neck, has been committing the murders, as well as Aarthi's abduction.
Somu is on the run, Aarthi is dying, Thillairajan is lost in love for his daughter and AC Adiyapatham is trying to crack the code, while murders continue to take place.
His assistant Doctor Mangaiyarkarasi takes care of Aarthi by visiting her home frequently.
Thulasi accidentally blurts out that Aarthi has AIDs as she was in the same condition years ago.
Before that, he reads some important files in Aarthi's computer and realizes that he had known everyone that has been killed, including the tanker lorry victim.
AC Adiyapatham finds out the main culprit and the whole gang, much to Akash and Somu's shock.
Not only him but also, Padmarajan, Anbarasu, Mangaiyarkarasi, Prabhu(Somu's friend and studio owner) and Arumugam(the man with the white scar).
When Kumaraguru refuses to share it with Somu and tries to kill Akash, he flees the place with the manuscript.
Afterwards, Adiyapatham dies after consuming the medicine when Kumaraguru does want to trade the secret with him.
Late that night, Thillairajan asks Somu to read his manuscript in the hope to find the ingredient.
He comes across Kumaraguru's pendrive and with details in it, starts predicting the future of Earth, such as robots taking over humans in the year 2050.
Years later, Visalakshi dies after completing a number of rounds in the temple, as predicted by her father-in-law, not even talking to Akash once.
It is not said what is in the letter and when Aarthi makes a fuss about it, Somu thinks about what sin he made in his previous birth(his first interview question at the beginning of the show).
It is known that in their previous birth, Somu was a rich landlord and had cheated on Aarthi who happened to be his girlfriend.