The social drama Ek Din Achanak was released in the year 1990 under the banner of National Film Circuit. The movie was directed as well as produced by Mrinal Sen. The top roles in the movie were played by Uttara Bavkar, Aparna Sen, Shabana Azmi and Shreeram Lagoo while Roopa Ganguly, Arjun Chakraborty, Manohar Singh and Moon Moon Sen were also there in the film. Music of the film was given by Anand Chitragupt and Milind Chitragupt while the songs were sung by S.P.Balasubramaniam, Lata Mangeshkar, Asha Bhosle and Suresh Wadkar.

The movie Ek Din Achanak was a psychological study that spends a troubled year with a family non-stirred by the mysterious disappearance of its lead actors. The movie that translates to “Suddenly One Day” is the production of acclaimed art-house director Mrinal Sen. The movie is a story of a professor ( Shreeram Lagoo ) who goes for a walk midst of rains but failed to return to the house. The evening converts to days and days to weeks, but there were no signs of him.

The family persons were clueless about what happened to him. Slowly the family members return to their daily activities. Professor’s son Amit ( Arjun Chakraborty ) establishes his fledgling business, his younger daughter Sima ( Roopa Ganguly ) resumes her studies at college and his elder daughter Neeta ( Shabana Azmi ) who is also the backbone of the family, returns to her office job. But somewhere in deep they were sad. Amit enjoys success but was sad for his father.

The songs of the movie are:
1.    Ek Din Achanak
2.    Aaye Hain Jalane
3.    Hum Hain Raja Raj Karen
4.    Yaar Mere Pyar Karo