Sivakasi movie as shooted in two languages at same time and this movie is all about underworld gangs. The story is about two friends who lose and find themselves amid the welter of gang wars and personal greed.
Kasi (Arjun) sets out to Mumbai in search of the killers of his parents. He finds two of the three, and finishes them.Siva lands up in the house of Anjali (Vedika), thanks to his friend the cab driver (Sunil). A don appreciates his daring and audacity and he is quickly enlisted by the bhai. Elsewhere, there is Siva (Jagapathi), he is part of another gang.
When Siva and Kasi come face to face, they realize they had been together in the prison before they had come to Mumbai. But still continue to have a go at each other
Meanwhile, Kasi, who helps Anjali (Vedika) and her family, falls in love with her. Siva has a thing going with Meena (Gajala).
Its love at first sight that grows as Anjali sees more of Siva in the next few days. Then Siva starts working for a ganglord Ravianna. Ravianna has rivalry with his brother Mani who is in the same trade. Kasi is the most trusted lieutenant of Mani. Siva and Kasi's paths cross because of their allegiance to rival gangs.The ganglords end up killing Siva's brother and Kasi's lover. But after being isolated from their gangs they become friends. And they both join to avenge the murders of Anjali and Kasi's brother.