决战Thallumaala revolves around a series of fights in the life of a young man named Wazim, Among these fights, the one that ends up topping the list is the massive fight that breaks out on his wedding day, which transforms Wazim into Manavalan Wazim, the internet sensation he is today. The fact that his bride was Beepaathu, an even bigger internet celebrity, only makes things worse. The Police S.I, Regi Mathew, who now believes his only shot at redemption and going back to normal is through a fist fight to the end with Wazim. As both men gear up for the final brawl, Wazim must also fight the fight of winning back the heart of his lost love and once bride, Beepaathu.