The story dates back to the late 1950s and revolves around an Indian Naval Officer Rustom Pavri (Akshay Kumar), who is happily married to Cynthia Pavri (Ileana D’Cruz). Their marriage hits the rocks when Rustom discovers about his wife’s affair with his friend Vikram Makhija (Arjan Bajwa). After returning early from his ship’s deployment, Rustom discovers Vikram’s love letters in Cynthia’s cupboard. While trying to find her, Rustom sees them together. He returns home and waits for Cynthia to return and then confronts her with the love letters, but walks away before Cynthia can explain. Rustom then gets himself a pistol from the Naval Ship’s Armory and makes a Trunk call to Defence HQ, New Delhi. Afterwards, he searches 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, to discover Vikram’s body in a pool of blood and Rustom walking away with the pistol in his hand. Rustom immediately surrenders to the police and Inspector Vincent Lobo (Pawan Malhotra) starts the investigation.
Vikram’s sister Priti Makhija (Esha Gupta) meet with public prosecutor, Lakshman Khangani (Sachin Khedekar) to get Rustom the toughest punishment possible. Truth, a local newspaper, publishes the news adding some spice to it, which creates a stir in the city. On the one side the Navy supports its officer and asks the police to hand over his custody to them while on the 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 and prefers police custody. While the Editor in Chief of Truth, Erich Billimoria (Kumud Mishra), creates a sympathetic image for Rustom in public, Rustom’s senior Naval officer Rear Admiral 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 hasn’t talked to her ever since he is in custody. 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. With the connivance of Priti, Vikram took advantage of Cynthia’s loneliness and she fell for him. However, on the day of Vikram’s murder, Cynthia had already broken-up with him for the sake of her marriage. Vikram cannot bear her spurning him and slaps her hard. She gets injured and walks out of Vikram’s house.