Prem Kumar (Vijay Sethupathi) is all set to get married to his lover Dhanalakshmi (Gayathri). A day before his wedding, Prem decides to try his hand at playing cricket with his friends - Bagavathi (Bagavathi Perumal), Balaji (Rajkumar) and Saras (Vigneswaran). The game gets little serious and Prem in a bid to catch a ball falls down only to get injured in his head. He quickly gets back on his toes as the injury is no serious. But soon after the match, the friends are in for a shock. Prem forgets a few days of his life and develops short term memory loss wherein, he remembers his life till college and recognizes his friends, but clueless about his marriage. Fearing troubles, the friends take him to a doctor, who says that he will recover anytime. So the friends plan to keep him in their company, enact all drama till he ties the wedding knot, with a hope that he would get back his memory. The sequence of events wherein the friends try hide Prem's problem to his parents, lover and take ...