Narantak Roy is an influential businessman who leads Roy Group, a corporate company and world's biggest crime syndicate that governs Waaji City, a fictional metropolitan. When Roy visits Mumbai for a business deal, he is killed in a deliberate car crash. Devaraj, the son of Roy's friend, business partner, mentor and the former crime syndicate leader Pruthviraj, plans to declare himself the next leader of Waaji City. Ibrahim, Roy's most-trusted secretary, tells Kalki, the legal advisor of Roy Group, Roy's family has been dead for decades and that he had been hiding a secret – that he had a son named Vishwank Roy – for 25 years. Vishwank foils Devaraj's plans by succeeding his father as the city's leader. Vishwank is determined to discover the identity of his father's murderer.
In Mumbai, a master thief steals ₹2,000 crore (US$284 million) with ease. The culprit proves difficult to identify because he used random, unrelated people who were unaware they were assisting in a robbery, to steal the money; and a nationwide search ensues. Ashok Chakravarthy, an undercover police officer, is assigned to lead the search with the help of crime branch officers Amritha Nair, Goswami, and David. They uncover a thief named Jai, whom Ashok meets in a bar. Ashok discloses to Jai the information on a black box – the key to the locker in Waaji City holding ₹2000 billion[b] (US$28.4 billion) of all of the board members of Roy Group. On Vishwank's orders, Kalki travels to Mumbai, retrieves the black box, and deposits it in a bank.During these incidents, Amritha and Ashok fall in love. After an intense chase to catch Jai stealing the box, Amritha, Ashok and David – the team's cyber-intelligence officer – confront Jai. However, It is revealed Jai is really the covert operative Ashok Chakravarthy. The lead officer who had been with the team is actually Saaho, who is the thief. Saaho escapes with his partner David, who helped him disguise his identity during the operation. It is revealed Devaraj killed Roy to usurp control of the city. Amritha, working as a double agent, tracks Saaho and pretends to be in love with him, and wants a share in the stolen money. Amritha falls in love with Saaho and she betrays Ashok.Devaraj shoots and kidnaps Amritha, forcing Saaho to give Devaraj the black box. Saaho, however, deceives Devaraj and gives the black box to Vishwank in return for Amritha's safety, which Vishwank reveals to Devaraj. Saaho destroys Devaraj's building and steals the money in Devaraj's lockers. Ashok and the police chase Saaho with a sniper in a helicopter and a person in a jet pack. Saaho overpowers his opponent. Amritha, also in the helicopter, tries to save Saaho by distracting the sniper, who pushes her into danger. Saaho saves Amritha with a jet pack but is arrested. Kalki is revealed to be on Devaraj's side; she opens the vault with Vishwank's fingerprint and the black box; instead of money, she finds pictures of Roy and his son. Saaho battles and defeats Devaraj's goons in Karana village, which Roy had previously protected.Devaraj arrives. Saaho announces himself to be Siddhanth Nandan Saaho, Roy's real son, who he lovingly kept hidden from the world, in the hopes of him taking over his reins one day. Kalki dies after seeing the portrait of Roy and Saaho. Saaho kills Devaraj by decapitating him. Meanwhile, Ashok and Amritha are shocked to learn about Saaho's real identity from Vishwank and Alex Fernandes (a criminal who once was saved by Saaho and seen by Amritha in the bar where Saaho first encountered Ashok). Ibrahim reveals to the board members of Roy Group that Vishwank was not Roy's son, but Ibrahim's own son; his real name is Iqbal. He was brought in to protect Roy's throne until Saaho can return to claim it and kill his father's murderers. Iqbal then proceeds to kill Prince before Saaho arrives to the meeting. Ibrahim reveals Saaho's real identity to the board members, and Saaho becomes the ruler of Waaji City and CEO of Roy Group.Months later, Saaho locates Amritha in Innsbruck, Austria, and proposes to her, which she accepts. A sniper aims at Saaho to take him out, to which, he opens his eyes, aware of the danger from the distance.