"We are not aiming to arrive at a conclusion with the film but want to ignite a debate regarding the case... Right now the opinion of the people is either the parents are guilty and justice has been served or injustice has been done.
"With this movie, there might be clarity on the fact whether justice has been done or not. It'll swing either way even more strongly," she said.
Aarushi's parents Rajesh and Nupur Talwar were convicted after their 14-year-old daughter was found dead in her room of her flat in Noida.
It was the hysteria surrounding the case which made Meghna take up the film to "clear up the fog" and uncover the truth.
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"It's a very sensational topic and what we realised when we were looking at the case was that there is a lot more sensationalism than the actual hard facts or evidence or even enough of thought gone into everything that went around with the case.
"Talvar" is set to release on October 2 and Bhardwaj, who released "Haider" on the same date last year, said he chose the day as it symbolises truth.
"October 2 is the date to say the truth. Last year we said it with 'Haider' and this time we will say it with 'Talvar.'"
The release comes after a well-received world premiere of the film at the Toronto International Film Festival.