Saravanan runs a company that supplies man power to political meetings and campaigns. He falls in love with Maya when they meet by chance. Saravanan's father has three sisters who have an enmity with him. How Saravanan unites his father with his sisters forms the crux of the story.
When a zombie outbreak occurs in a hill station, a traffic cop takes on the responsibility of transporting a team of doctors to a city hospital so that they can find an antidote.
Sura is a story that is set in Yaazh Nagar, a fishermen hamlet in coastal Tamil Nadu. The name of the place has a lot of political significance with the recent political turmoil over the ethnic strife in the neighbouring Sri Lanka. Sura (Vijay) is born and brought up here in the company of his friend, Ambar La alias Umbrella (Vadivelu). Meanwhile, he comes across young bubbly Poornima (Tamannaah) who chooses to end her life unable to cope with the death of her pet dog.
Birla Bose, an encounter specialist's next assignment takes him to the holy city of Rameshwaram, where the greatest challenge of his career awaits for him.
Prabhakaran travels all the way from Tamil Nadu to Kolkata for a purpose. He takes up a job in a college and meets Aishwarya. He also comes across Paro in Kolkata and they end up falling head over heels in love with each other. Meanwhile, there is a group in the look out for Prabhakaran at the behest of Eswara Pandian and his son. The ensuing sequence of events results in Prabhakaran revealing his true face through a flashback and there begin the twists and turns, which also unravels a sibling story with underworld background.