| Director | Deeno Dennis, Michaël Youn |
|---|---|
| Box office | ₹25.5 crore |
A painting is smuggled from abroad and spotting it amidst a road check, Benjamin Joshua, an ACP in Kochi, intervenes and transfers it into an encrypted location. Months later, in a Bengaluru-bound bus, a hardcore gamer Sunny acquaints with his co-passenger Aryan Achary, a seemingly introverted accountant, also traveling to the city. Due to a turn of events a curious Sunny goes through Aryan's laptop which reveals that the guy is neither Aryan Acharyan nor an accountant. With his identity leaked, Aryan, revealing himself as John, confides to Sunny about himself.
John is a former police forensic professional who is on sabbatical due to some reasons, and Benjamin Joshua's childhood friend. In Kochi, a mysterious gang of serial robbers who disguise themselves and loot strange items from certain locations create chaos. During the investigation, Benjamin learns that the killers are following the pattern of a video game - each time an officer in Benjamin's team is picked, and sourced with a random clue which should be cracked before the loot happens, which Benjamin's team fails every time. John arrives to aid Benjamin in tracking down the criminal gang. The gang even bugs Benjamin himself by luring his son with a Mario gameset, which the boy keeps despite Benjamin warning him to not take it.
After missing the gang a couple of times, Benjamin nabs one of the boys in the gang who reveals nothing despite being tortured by the police. However, John links the clues to a gameplay with his investigation, and Benjamin's son, also a gamer, reveals about the game he kept out of curiosity. With the boy's help, and playing through the game titles as Bazooka, John and Benjamin crack the final level. John finally finds that it leads to the smuggled painting, which is currently locked in a high-profile customs office in Kochi. John, officially rejoining service, devises a heavy security electric lock to mask the painting at any cost.
Listening to the story, Sunny challenges John that a hardcore hacker can easily crack the lock. John, seeing his confidence, allows him to try. Despite initial hurdles, Sunny cracks the lock hacking into it, which amazes John. As they reach Bangalore, the men part, as Sunny goes on to meet his Instagram girlfriend as planned and John leaves too. Later, Sunny sees in the news that John Caesar, who assisted the police, has been arrested in Kerala in connection to the lock he made failing.
Sunny rushes back to Kochi to know the truth. Meanwhile, Benjamin is in court, trying his best to free John as only he can bring the case to an end. However, the arrested John Caesar is shown to be a different man, Benjamin's childhood friend who was assisting him in the serial robbery case.
Simultaneously, Sunny spots his girlfriend Jovita, whom he met in Bangalore, in a car in Kochi. Sunny follows her in a car with her real boyfriend to their hideout. The duo fights Sunny, who nevertheless overpowers them. Their leader, an eccentric and loud guy revealed to be the same person who posed as John in the bus journey, arrives with the rest of the gang. It is revealed that guy, calling himself "Bazooka" or "Mr. Mario", is a monomaniac and addict gamer whom Benjamin and the real John were trying to trace all along. Bazooka reveals how Benjamin angered him while locking up his painting which has a hidden treasure in it. To exact vengeance, Bazooka and gang employ a series of robberies to trouble Benjamin and the police. However, John Caesar was smarter than their predictions and made it near impossible to lay hands on the painting (Every scene of "John" featured the actual John Caesar who was guiding Benjamin and his team). That's when Bazooka, posing as John and choosing Sunny on whom he has a grudge for continually surpassing him virtually, lures Sunny into cracking the painting lock by leveraging his hacking skills. With the truth unrevealed and learning of the Bazooka gang's insanity, Sunny leaves, feeling helpless. All of the worth looted by the gang is dumped back right in front of the police.
Bazooka is seen flying to Dubai, where in Benjamin and Sunny are shown as his co-passengers in the flight. Benjamin finally gets to interact with Bazooka and assures that he'll lock him up, while Bazooka challenges him to do the same after they land in Dubai (possibly hinting at a sequel).