Official Synopsis:
Yeh Jawaani Hai Deewani is the story of the relationship between two characters, Bunny (Ranbir Kapoor) & Naina (Deepika Padukone), at two separate but defining times in their lives… first, when they are just out of college and standing on the crossroads of multiple decisions that will shape who and what they become… and then later on, in their late-twenties when they meet again, holding on to certain fulfilled and certain unfulfilled dreams, at a crossroads of another nature this time… how these two characters affect, change, befriend and eventually fall in love with each other is the journey the film aspires to take us on…

The movie is heavily inspired from DDLJ and borrows from some other movies as well. While Simran goes on a trip across Europe by asking for permission from her overbearing father Naina decides to just leave for a trekking trip to Manali by writing a letter to her overbearing mother. They both meet at the railway station just like Raj and Simran do and there is a reenactment of the DDLJ train scene where Raj helps Simran board the train. While Simran falls in love with this carefree, fun guy Raj who flirts with Simran’s friend, Naina falls in love with this carefree, fun guy Bunny who flirts with Lara.