The story opens its first page from the celestial backdrop of Varanasi. Kundan is a strong believer of God and a son of a Tamil priest. Since his childhood days, Kundan (Dhanush) starts weaving one-sided love in Zoya (Sonam Kapoor), a Muslim girl residing in Varanasi, whose father is a professor. While in ninth standard, Kundan comes with a love proposal to Zoya and she rejects it by taking it very lightly. She even slaps Kundan for sixteen times for this. Emotional blackmailing by Kundan like slitting his wrist bewilders Zoya's mind to some extent. At this point of time, the orthodox family of Zoya stands as a hindrance between the path of two teenage - lovers. After this incident, Zoya moves to Aligarh for her further studies. Kundan matches fine-tuning with Zoya's family in this period by assisting them with various household chores. Zoya returns to her hometown Varanasi after a gap of eight years.

Again Kundan attempts to ask Zoya for love, but this time Zoya refuses it revealing that she is in love with a guy named Akram (Abhay Deol) . Zoya meets Akram, while studying in Delhi. Now, Zoya urges Kundan to convince her family about her marriage with Akram. Being reluctant at the initial stages, Kundan eventually agrees with it. Kundan gets his work done and the wedding of Zoya and Akram gets fixed. Kundan even promises Zoya that he will also tie the knot with some other girl and will finally close the chapter of Zoya from his life forever. Kundan proposes his childhood buddy Bindiya (Swara Bhaskar) for marriage. Bindiya is the one, who had crush on Kundan since their childhood days. The remaining portion of movie discloses a bundle of twists and twirls in the tale.