During the 1950s, Indian Navy Officer Rustom Pavri (Akshay Kumar) is happily married to Cynthia Pavri (Ileana D'Cruz). Their marriage hits the rocks when Rustom discovers his wife's affair with his friend Vikram Makhija (Arjan Bajwa). After returning early from a trip to the seas, Rustom discovers Vikram's love letters in Cynthia's cupboard. While trying to find where she is, Rustom also witnesses both of them together. He returns home and waits for Cynthia to return and then confronts her with the love letters, but walks away before Cynthia could explain anything. Rustom then issues himself a pistol from Naval Ship's Armory and makes a Trunk call to Delhi. Afterward, he seeks for Vikram, first in his office and then at his home. After Rustom enters Vikram's bedroom, the servant hears three gun shots and rushes to the room, only to discover Vikram's body lying in the pool of blood and Rustom walking away with pistol in his hand. Rustom immediately surrenders to police and Inspector Vincent Lobo (Pawan Malhotra) starts investigation.
Vikram's sister Priti Makhija (Esha Gupta) hires the best lawyer in the city Lakshman Khangani (Sachin Khedekar) to get Rustom worst punishment possible. While a local newspaper TRUTH publishes the news adding some spice to it, which creates a stir in whole city. At one side Navy supports their officer and asks police to hand over his custody and on other side the Parsi community offers help by hiring a good defense lawyer. Rustom refuses everybody's help and decides to fight the case on his own. While the Editor in Chief of Truth newspaper, Erach Billimoria (Kumud Mishra) creates a sympathetic image for Rustom in public, Rustom's senior Navy officer Prashant Kamat (Parmeet Sethi) sends two goons to his house to search for a set of documents, but they fail to find anything. Scared Cynthia rushes to jail to inform Rustom, who wasn't talking to her until then. Rustom finally meets and listens to Cynthia's story, about how she was lonely and upset when Rustom went away to London for many months. Vikram took advantage of her loneliness and Cynthia fell for him, but on the day of Vikram's murder Cynthia had already broken-up with him for the sake of their marriage.
On Rustom's instructions, Cynthia blackmails Navy officer Prashant Kamat for 5 crore rupees in exchange of the documents he needed. While in the court hearing, Rustom unexpectedly pleads not guilty in front of the judge, which leads to a jury trial. The crux of the case was whether Commander Rustom shot Vikram as "self-defense" or whether it was premeditated murder. At the culmination of the trial, Rustom is found not guilty and is freed. Rustom reconciles with Cynthia.