The movie "Love Aaj Kal" revolves around the story of two young individuals, Sonia (Preity Zinta) and Param (Saif Ali Khan), who are both on a journey of self-discovery. Sonia, a carefree and independent woman, and Param, a free-spirited and adventurous man, meet on a train and start a conversation. As they travel together, they share their thoughts, dreams, and aspirations, and a romantic connection develops between them.