The song was composed by Sachin Dev Burman and performed by Kishore Kumar.
In the film, Rajesh Khanna, the male protagonist, sings the song atop an open jeep virtually chasing the heroine, Sharmila Tagore, who was aboard the toy train in Darjeeling (Darjeeling Himalayan Railway).
[3] In the film, Rajesh Khanna stars as Arun Verma, a young pilot from the Indian Air Force.
On the Darjeeling toy train, Sharmila Tagore is Vandana, a recent college graduate who is returning to her hill station home.
Arun and his friend, Madan (Sujit Kumar) have taken leave without permission, and as Madan drives the open top jeep, Arun sings the song in Kishore Kumar's voice, flirtatiously eying Vandana, and later in the film, when they meet again, they fall in love.