Ennaku 20 Unakku 18

Preethi (Trisha) and Sridhar (Tarun) meet on a train and are interested in each other. Yet they fail to initiate any sort of personal conversation, even while knowing that the train ride will soon come to an end. Without the knowledge of eachothers names, address, etc they spend months searching for each other regardless of what their friends tell them. A series of unfortunate events bring them closer...