Natarajan Iyer (Delhi Ganesh) is an innocent man, a Brahmin Tamil, and a house owner in Triplicane, Chennai, Tamil Nadu, India who lives with his daughter Gayatri (Kanika), who is a college student near the Parthasarathy Temple. He is looking for the right tenant for the upper portion of his house. Since, he often fears that the prospective tenant might romance with Gayathri, he filters all the people who come asking for the house. He rents out the house to five bachelor students, who pretended to be good. Natarajan wants to get rid of the students, who used to stay at a hostel, but were expelled due to bad behavior. They had heard about Natarajan, his house, which includes a spare room apartment, which hasn't been used for about years and his conditions on living there including his fears and his filtering. They pretended to be good college students and were allowed to live in the house by Natarajan. Unfortunately, they end up showing their true nature to Natarajan and Gayatri, while causing Natarajan to have so much trouble. Natarajan tried to get them out of here, but was threatened by them along with Gayatri. He soon gets the help of Auto Sampath (Vivek) who is an auto driver and a friend of Mani. Auto suggest to Natarajan about hiring a rowdy to take care of the tenants, instead of hiring a lawyer, as by doing that, not only will the tenants get out of there, but also he and Gayatri. Natarajan accepted Auto's suggestion and Auto took him to see Mani at a prison.