The film opens with a reporter entering into a small town that looks abandoned, with a statue that speaks (Ranbir Kapoor). The reporter asks the statue where the people of the town are, the statue then narrates the story behind it.
Prem (also Ranbir Kapoor) is a free-loader who, while helping his friend elope, he meets a beautiful girl Jenny (Katrina Kaif). They both share the trait of stammering when they are emotional. In such a moment, the stammering Jenny induces a spontaneous stammer in Prem, which she misunderstands for mockery. Although this makes her dislike Prem initially, when she finds out his stammer is authentic, the two become friends. Prem eventually falls in love with Jenny, although she is oblivious to this and only considers him a friend. When he tries to tell Jenny his feelings, he finds out that Jenny is in love with her college friend Rahul (Upen Patel).
He then meets Rahul and finds out that Rahul loves Jenny more than his family, so helps them board a train to escape. However, Rahul disappears at the train station, and Jenny returns to Prem so Prem can help her find Rahul.
Rahul's father does not like Jenny and completely opposes relationship between Jenny and Rahul, mainly due to the religious barrier, Jenny being a Christian and Rahul a Hindu. When Prem visits Rahul's house for Jenny's proposal with Rahul, he is insulted by Rahul's father. Prem convinces his mother to let Jenny hide in their house while Jenny's family search for her, but they are eventually caught by the police. So Jenny lies that she and Prem are in love, to save Rahul's name. While Prem corroborates Jenny's lie, he gets emotional and spurts out his true feelings for Jenny, which Jenny mistakes for over-acting.
Prem and Jenny successfully go to a club where Rahul birthday party is being held so that Jenny and Rahul can be reunited and eventually convince Rahul Father to support the relationship. Rahul then tells Prem that he and Jenny are going to prepare for the wedding in two days. ReadMore>