The movie starts with D. N. Tripathi ( Piyush Mishra ) , a lyricist , who writes a biography on Sanjay " Sanju " Dutt , ( Ranbir Kapoor ) , comparing him with Mahatma Gandhi . A flabbergasted Sanjay has him thrown out . The Bombay High Court delivers its verdict regarding the 1993 Bombay bombings and sentences Dutt to five years jail term for violating the Arms Act , 1959 . His wife Manyata Dutt ( Dia Mirza ) approaches Winnie Diaz , ( Anushka Sharma ) a London-based writer , to write Sanjay 's biography and present his version of his life to the public . Although unwilling at first , Winnie is asked by Zubin Mistry ( Jim Sarbh ) , a real estate builder , to not write the biography , which intrigues her . Winnie first interviews Sanjay , and his life is revealed in a flashback
1993 Bombay bombings
1993 Bombay bombings
Sanju