The Chennai city lives in fear of a psycho killer. Confidence in the police wanes until Arjun and Andrew join. Arjun, with a dark past, unveils truths about the killer. They finally arrest the killer but he escapes and chaos ensues. Arjun loses Andrew and his love, descending into darkness. The story follows Arjun's journey to vanquish the killers.
Lingadurai Ayya is a Kind hearted person in the village Vaeliyur, He spent all his money and wealth for the people and helping villagers and needy people. Some of Transgenders find an youngman Kumaresan who fell unconscious on the village road to Lingadurai Ayya’s house . Lingadurai taking care of him and offers shelter food . Murugavel is a caste leader didn’t likes Kumaresan and sees him as an enemy, then giving lot of troubles to Kumaresan. One day when Kumaresan is out of village, Murugavel started a caste organization and created riots between castes.. In this struggles Kumaresan’s Pet cattle Appu slashed there after Kumaresan commits suicide and died.
Five YouTubers from India, Arjun, Rithvika, Varun, Grace and Rahul, get selected by a company in the UK for a project in Black Tourism. The project involves exploring a haunted mansion that belonged to one British-Indian archeologist, Aarthi Rajagopal. On entering the mansion, they encounter a supernatural being. Can they break the curse?
An old couple buys a 200 year old bungalow to convert into a resort but to their horror they find out that a supernatural entity resides there. They seek help from a group of young youtubers to find out more. Will they uncover the truth? What is the connection between them, the estate and Naayaadi?