This is a story that talks about a young lazy boy, Karan Shergill (Hrithik Roshan), who has no aim in life and later transforms himself into a responsible army officer. The movie depicts Karan's true dedication towards his goal because of his love, Romi (Preity Zinta). Soon, Romi gets engaged to another man. The lovers meet again in Kargil where Karan is at war. Will the two re-unite again?