Ravi Varma (Navin Nischol) who had lost his parents in his childhood and later his beloved Rajni in a car accident, keeps himself immersed in business, He is advised by his family physician to take a holiday.
Rajni's father Dr. Puri (Madan Puri is Ravi's well-wisher. He wants Ravi to get married and get over the shock produced by Rajni's death.
To escape Dr. Puri's well meaning but irksome, persistent efforts, Ravi decides to go to Darjeeling. where he had his ancestral bungalow 'Mount View.'
The bungalow ' Mount View', however, has now turned into ' Hotel Mount View' and its caretaker Hanuman Singh (Jagdeep) has been posing as the owner.
A professor of Botany Miss Aarti Mathur (Shabana Azmi ) is staying there with her girl students. Then circumstances take a strange turn and Ravi and Aarti are thrown together. As the two come nearer, the mutual sympathy and understanding mature into love.
Just about when the two lovers were planning to settle down together, a tragic incident prevents Aarti from reaching Ravi. But how finally the fate brings the two lovers together, though not befor they have gone through great emotional upheaval, makes " Ek Baar Kaho" a moving experiance.