Based on an Indian Bengali short story by Sunil Gangopadhyay, Anuradha plays cupid and brings Shantanu and Kalpana together but a freak accident distances Kalpana and him. Shantanu then realizes that Anuradha is the one who truly loves him.

Ajayan is back home after a long time away and he is hoping to be with his mother for the rest of his life, but things go wrong when a young boy claims to be his son.

Kambilikkandam Jose (Subair), a drug baron reaches down to Kochi to meet Pattakkalil Purushothaman Pillai (Vijayaraghavan), demanding a huge hike in his commission. Popularly known as Appichai, Purushothaman Pillai is one of the largest drug dealer in south India, along with Sethumadhavan (Sai Kumar), his foster son. Appichai calls back Sethu, who is on a vacation in a cruise ship in Goa. Sethu, on his arrival back in Kochi kills Jose, with the help of Balagopal (Ramu), the IG of Police. But the death of Jose creates a strong protest inside the state and the Chief Minister (Janardhanan) orders a detailed investigation on the matter. Narendran (Mammootty), the Assistant Commissioner of police, is assigned the charge of investigation. Popularly known as Nari (tiger), for his aggressive and belligerent style of behavior, Narendran, begins his probe

Railway Anti-Criminal Task Force (RATs) investigates three unrelated murders happened in a train.