Subramani (Dhanush), known as Sullaan among his friends, is the son of a Corporation cleaner (Manivannan). A first year college student, his only objective in life is to have fun with his friends.
He has a few unexceptional run-ins with Soori (Pasupathy), a money-lender who charges atrocious rates and then goes after those who fail to pay him back. But when Soori's actions touch his own family and friends, Sullaan is forced to strike back.