After being hit by an iron rod, Sanjay Ramaswamy, a business tycoon, suffers from anterograde amnesia. He is unable to remember anything beyond fifteen minutes. Under such circumstances, he sets out on a quest to find the people who were responsible for his lover Kalpana's murder.
Suriya
as Sanjay Ramaswami / Manohar
Asin Thottumkal
as Kalpana
Nayanthara
as Chitra
Pradeep Ram Singh Rawat
as Lakshman and Ram
Riyaz Khan
as Police Inspector
Manobala
as Kalpana's boss
Sathyan Sivakumar
as Actor / Server / Fake Sanjay
Venba
as Child artist
