Das, who is returning to direction after 2009 film "Firaaq", said the movie is not a conventional biopic as she has tried to balance different facets of Manto's "incredibly interesting" personality.
"It has definitely been the most challenging project of my life. When I did 'Firaaq', I thought it was the most challenging (one). Then I had a child and I thought ok... People don't tell you enough about how it is to be pregnant and have a child. But joys and challenges always come together... So 'Manto', in that sense, is my third baby and second film," Das said yesterday at the Times Litfest here.
Actor Nawazuddin Siddiqui plays the role of Manto in the film while Rasika Duggal features as his wife Safia.
The director said she has tried to simplify the author's writing without compromising on its soul.
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"It was in Urdu and not everyone understands it. I have tried to simplify it and yet keep the soul of it. You can't dump it down, after all it is a writer's writing. You have to value and respect his word as well. One has to tread that path very carefully."
"I spent a lot of time with his daughter, he had three daughters. They have wonderful memories of him because he was a wonderful father. She is very much in the film because it was an important aspect of this kind of story," she said.
Rather than dealing with Manto's entire life, her film chronicles four years of Manto's life - two years before the Partition and two years after that - the most creative yet the most turbulent period for the writer.
Manto is remembered for depicting the horrors of Partition in his stories. He loved Mumbai and spent many years in the city but migrated to Pakistan in 1948.