It is a story of the exhilarating and terrifying journey of four characters as they navigate through their youth; from their carefree laughter as they set off on a holiday together in their colleges days, until their bittersweet tears as they watch the first of their bunch get married.
Yeh Jawaani Hai Deewani brings two polar opposite characters, who at one point were from the same batch at Modern School, Naina Talwar (Deepika Padukone), a studious bespectacled young girl and Bunny (Ranbir Kapoor), a carefree young travel show host intent on breaking out of the pattern of getting an education, a career, wife, children, retirement, and eventually death.
With a desire to be free and live a life of wildness, he embarks on a journey with his two best friends, Aditi (Kalki Koechlin), a tomboyish girl and Avi (Aditya Roy Kapur), a satirical joking boy. He meets Naina, fails to completely recognise her, eventually invites her to spend time with him and his friends in Kashmir and ultimately, their crazy journey with the ultimate destination, “Love”. As the two mature from the age of 21 to their 30′s, they recognize their priorities, realize their true desires and celebrate madness, warmth, marriage, wildness, freedom, togetherness, reunions, friendship, breakups, family, and love.