The film starts with Aisha Verma (Shraddha Kapoor) calling her husband and leaving a message for him. A mysterious man in a hood breaks into her house, murders her with a screwdriver, and throws her out of the window. At her funeral, CBI officer Aditya Rathore (Shaad Randhawa) points out to the police that it is vital to track down the murderer or else Guru Divekar (Sidharth Malhotra), Aisha’s husband, would go on a killing spree. Here Guru’s background is shown in flashbacks, along with how he meets Aisha. Guru, in the past, was a ruthless hitman working for mob boss Caeser (Remo Fernandes), in Goa after Caesar’s decision to give Guru a chance to murder the goons who killed his parents. He gets arrested for killing a young man, Debu, but ultimately gets bailed, as Debu’s mother, a witness, refuses to testify against Guru. She however warns Guru that one day God would make him pay for his crimes and he will also end up losing a loved one.