Opposites attract, right? That's what happens when Raj (Shahrukh Khan) and Priya (Rani Mukherji) bump into each other on a highway.
They are as diverse as chalk and cheese. Raj is an impulsive, middle class, hard-working, emotional guy, while Priya is prim and proper, highly sophisticated and brought up in the lap of luxury.
They throw caution to the winds and dare to fall in love. But, gradually, things start changing. Romance takes a backseat, the need to impress no longer exists. What happens next?