The film starts with Dhivakar (Vincent Asokan) and his family celebrating his birthday. A sudden lightning strike kills him and his son. At a movie theatre, a man gropes a woman, and a small commotion ensues, which was stopped by ACP Paul Dhanarajan (Aadukalam Naren). The plot shifts to detective Kaniyan Pongundran (Vishal), who lives with his associate Manohar (Prasanna). They both come across Mallika (Anu Emmanuel).
One day, a schoolboy Naveen (Master Nishesh) visits Kaniyan and Manohar with a case that his pet Pomeranian Nemo was shot dead and asks them to find the killer. Naveen gives them the bullet from Nemo’s body. Kaniyan finds that it is a 9mm bullet which had been ricocheted from Nemo. At the crime scene, he finds a tooth, with which he tracks its owner as Swarnavel (Ashvatt). Meanwhile, Kamalesh (John Vijay) visits a travel agency to deliver a sofa stashed with money to five members who run the agency: Devil (Vinay Rai), Muthu (Bhagyaraj), Pritha (Andrea Jeremiah), a stout man (Dheeraj Rathnam), and a bald man (Siddhanth Venkatesh).