Manisha Koirala had got into the skin of the legendary actress Nargis Dutt for the biopic of Sanjay Dutt starring Ranbir Kapoor as Sanjay. The film tapped on the lesser known fact that Sanjay Dutt had an emotional journey with his mother that ended with the demise of Nargis Dutt.

The trailer of Sanju showcases the various facades of the actor's life, from drugs to women. Sanjay Dutt spent his youth being under the influence of substances while his mother Nargis Dutt was away battling cancer in the US. The legendary actress during her illness would take time to record tapes for her son. However, under the influence of substance abuse, Sanjay Dutt would not hear the tape-recorded messages. It was only after the demise of Nargis Dutt when Sanjay Dutt regained sobriety that Sanjay Dutt heard the tapes. The actor had an emotional meltdown on listening to his mother's words.