Na Tum Jaano Na Hum is a romantic musical drama. The movie follows the story of a bright and happy girl named Esha Malhotra (Esha Deol). Esha falls in love with her pen friend Rahul (Hrithik Roshan), who has the same feelings about love and other aspects of life as Esha. The two continue exchanging letters which brings them closer. However, Esha’s family arranges her marriage to Akshay Kapoor (Saif Ali Khan). Furthermore, Akshay turns out to be Rahul’s friend, and Esha and Rahul meet each other, but of course unaware of their pen pal’s real identity, the two don’t recognize each other. Things take a turn when Esha realises that she doesn’t love Akshay, but her pen pal. Will the two be able to accept each other and move on after learning each other’s true identity?