An unusually intense storm pattern catches some commercial fishermen unaware and puts them in mortal danger.

A wrongdoer is caught red-handed and he is not going to forgive the man who exposed him.

Ulkuthu is set in a small coastal town which is ruled by Kaka Mani (Sharath Lohitashwa) and his brother Saravanan (Dhilip Subbarayan), loansharks who deal in blood and blows when their debtors don’t pay on time.

When Samuthira Raja, a corrupt politician, tries to seize the villagers’ land, Sura, a brave and powerful fisherman, sets out to fight against him.