Young Mahendra belongs to a family of musicians, but once the family is cursed by their teacher. Mahendra's elder brother becomes blind and to avoid the same fate he goes to Kolkata and lives in the house of his father's friend Umeshchandra. He gets romantically involved with Umeshchandra's daughter Madhuri. Madhuri tries to make Mahendra modern and pursue his musical career. In spite of having good singing ability, Mahendra refuses to accept this due to his family values. He leaves their home and takes shelter in Kolkata. But the curse strikes him also and he falls seriously ill.
At first director Sudhir Mukherjee wanted to Sachin Dev Barman as music director for the film but Barman rejected the offer to give time from his busy schedule. Then Hemanta Mukherjee who is in Mumbai that time he wanted to return to Kolkata showing any reason when he heared this news he immediately meet to Sudhir Mukherjee and signed for the film. This is marked beginning of Uttam Kumar Hemanta Kumar duo, but many people said this not the first time that Hemanta sing on Uttam's leap. They first worked in Sahajatri in 1951. But there is no footage available of Sahajatri. So Shapmochon officially recognized as their beginning.[4]
The songs become very popular. Hemanta Mukherjee was the music director of the movie and composed tunes for the songs. Lyrics were written by Bimal Ghosh (as Kavi Bimal Chandra Ghosh).[5]
All lyrics are written by Poet Bimal Chandra Ghosh; all music is composed by Hemanta Mukherjee
The film became a blockbuster hit and ran near 100 days in theater. The songs become popular and contributed a lot to the film's success. After the film, The Uttam-Hemanta combination became iconic and hugely successful and regarded as the most popular singer-actor duo in the history of Bengali Cinema.[6]