Op een avond, terwijl het behoorlijk regent, gaat een professor naar buiten voor een wandeling maar keert hij niet terug. Naarmate de daaropvolgende dagen en weken verstrijken is er nog steeds geen teken van leven van hem. De gezinsleden zijn bezorgd en proberen terug te keren naar hun dagelijkse gang van zaken. Ze trachten te begrijpen waarom de professor is weggegaan. Niemand begrijpt wat er is gebeurd.
Nee, helaas is एक दिन अचानक nog niet beschikbaar op Netflix in Nederland.
| Directing | Mrinal Sen | Director |
| Writing | Shashi Anand | Dialogue |
| Directing | Siddhartha Dutta | Assistant Director |
| Directing | Rahul Bose | Assistant Director |
| Art | Alok Upadhyay | Assistant Director of Photography |
| Art | Sunirmal Mazumdar | Assistant Director of Photography |
| Art | Subrata Debnath | Assistant Art Director |
| Art | Ashok Nag | Assistant Art Director |
| Art | Debashish Ghosh | Assistant Art Director |
| Editing | Rathin Bose | Assistant Editor |
| Art | Biswanath Das | Assistant Production Design |
| Art | Chakradhar Mahapatra | Assistant Production Design |
| Costume & Make-Up | Hara Das | Assistant Makeup Artist |
| Costume & Make-Up | Manu Dutta | Costume Designer |
| Costume & Make-Up | Pulin Kayal | Costume Designer |
| Production | Jitesh Basu Thakur | Production Manager |
| Camera | Subhash Nandy | Still Photographer |
| Crew | Mukul Chaudhuri | Production Controller |
| Costume & Make-Up | Debi Haldar | Makeup Artist |
| Costume & Make-Up | Ram Prasad Kahar | Makeup Artist |
| Art | Goutam Basu | Art Direction |
| Sound | B K Chaturvedi | Sound Recordist |
| Editing | Mrinmoy Chakraborty | Editor |
| Camera | K.K. Mahajan | Director of Photography |
| Production | Ravi Malik | Producer |
| Production | Debasis Majumdar | Producer |
| Sound | Anup Mukhyopadhyay | Sound Designer |
| Writing | Ramapada Chowdhury | Novel |
| Writing | Mrinal Sen | Screenplay |
| Sound | Jyotishka Dasgupta | Original Music Composer |
| Directing | Rashid Iqbal | Assistant Director |
