71-year-old Bachchan plays a ghost-turned-politician who enters the electoral fray to rid the country of corruption and other ills which he finds rooted deeply.
The movie, released on April 11, also sends a strong message to the viewers about the importance of voting.
Bachchan said it was a rare honour for him and the crew that the President consented to watch the film at a private screening in Rashtrapati Bhawan along with a select gathering.
It is about an elderly man who dies and goes to the ghost kingdom where he is mocked at for his failure as a ghost, as he was unsuccessful in scaring off a kid, he said.
He decides to redeem himself when ghosts tease him and ends up searching for a child to terrify. He befriends 14-year-old Parth Bhalerao, who plays role of 'Akhrot', a slum kid, and helps him take on the country's most powerful politician.