The idea for the film came from a Bengali short story, Hinger Kochuri, which Samanta read. It was penned by Bibhutibhushan Bandopadhyay, whose novels, Pather Panchali and Aparajito, Satyajit Ray had adapted on screen. Even as he was trying to get in touch with the writer for the film rights, he learnt that a Bengali film based on the same story, Nishi Padma (The Night Lotus), had already been released in October, 1970. Co-written and directed by Arabinda Mukhopadhyay, it starred Uttam Kumar as Ananga Dutta, a lonely businessman looking for love and Sabitri Chatterjee as the ill-fated Pushpo. It was the highest-grossing film of the year and had bagged two National Awards, for ‘Best Male Playback Singer’ (Manna Dey) and ‘Best Female Playback Singer’ (Sandhya Mukherjee). Still, Samanta decided to go ahead with the Hindi film, with Khanna playing the businessman, Anand Babu in this version, and Tagore as Pushpa, because the story had touched his heart.