John Wick: Chapter 2 is a 2017 American neo-noir action thriller film directed by Chad Stahelski and written by Derek Kolstad. As the direct sequel to John Wick (2014), it is the second installment in the John Wick film series. The film stars Keanu Reeves as the title character, with a supporting cast of Common, Laurence Fishburne, Riccardo Scamarcio, Ruby Rose, Lance Reddick, Peter Stormare, Bridget Moynahan, Franco Nero, John Leguizamo, and Ian McShane. The film's plot follows retired hitman John Wick (Reeves) as he is forced back into his old life to fulfill a blood oath to crime lord Santino D'Antonio (Scamarcio).

Following the box office success of the previous film, Stahelski and the first film's uncredited co-director David Leitch said a sequel film began development in February 2015. Later that same month, Jon Feltheimer confirmed plans for additional John Wick properties to create a media franchise, and announced the return of Kolstad as the sequel's screenwriter. Principal photography began in October 2015 and lasted until early that following year, with filming taking place in Montreal, New Jersey, New York City, and Rome.

John Wick: Chapter 2 had its premiere at the Arclight Hollywood in Los Angeles on January 30, 2017, and was released by Lionsgate in the United States on February 10. The film received acclaim from critics, with praise for the action sequences, direction, editing, visual style, and the performances of the cast, particularly Reeves. It grossed US$174.3 million worldwide, becoming the then-highest grossing film in the franchise. A sequel, John Wick: Chapter 3 – Parabellum, was released in May 2019.

John Wick infiltrates a smuggling compound run by Abram Tarasov, who is highly strung following the recent deaths of his nephew Iosef and brother Viggo at John's hands. There, he recovers his stolen Boss 429 Mustang and kills all of Abram's men in a violent rampage, but spares Abram himself under the promise of peace. Returning home, he sends his Mustang off to be repaired by Aurelio and attempts to restart his life of quietude.

That night, John is visited by the Camorra crime boss Santino D'Antonio, who, given John's brief return from retirement, is now seeking his services. John is bound by a "marker" (a medallion symbolizing a blood oath) with Santino, who had helped him complete the "impossible task" that allowed him to retire and marry Helen. Nevertheless, John refuses, prompting Santino to destroy his house with a grenade launcher. After surviving Santino's attack, he travels to the Continental Hotel in New York City, where Winston reminds him that the underworld has two unbreakable rules: no "conducting business" (i.e., assassinations) on Continental grounds, and honoring the marker. To avoid a death sentence, John reluctantly accepts Santino's marker and is tasked with assassinating Santino's sister Gianna, allowing Santino to claim her seat at the "High Table," a council of twelve high-level crime bosses in the underworld. Santino sends Ares, his mute bodyguard, to observe John's mission.

In Rome, Italy, John makes his way through Gianna's coronation and finds her in her dressing room. Faced with certain death, she chooses to slit her wrists, after which he shoots her in the head to end her suffering and fulfill Santino's marker. While leaving the site, John is attacked by Gianna's bodyguard, Cassian, forcing him to flee to the nearby catacombs, where he is double-crossed by Ares, who intends to kill him to tie up loose ends on Santino's behalf. After killing most of Ares' henchmen, Cassian again pursues John, with the ensuing fight leading them into the Rome Continental, where they are stopped from "conducting business". John explains that he was forced to kill Gianna due to her brother's marker. Cassian, while understanding, tells him that he cannot let the assassination go unpunished, but promises to grant him a quick death.

The Rome Continental's manager, Julius, gives John safe passage back to New York. Santino has opened a contract to have John assassinated, ostensibly to avenge his sister's death. As John fights off numerous assassins, Winston visits Santino and confirms the marker's fulfillment, thus freeing John from being unable to defy or harm Santino.

In the New York City Subway, John encounters Cassian, and the two men engage in a grueling melee that ends with Cassian being stabbed in the aorta and left for dead. Now severely injured, John seeks aid from an underground crime boss known as the "Bowery King." Intrigued by his intent to kill a member of the High Table, the Bowery King sportingly gives John a Kimber M1911 pistol with seven bullets—one for each million of the contract. He also directs him to an art museum, where Santino holds a gala. John attacks the museum and kills all of Santino's subordinates, including Ares, whose actions buy time for Santino to escape to the Continental, where he boasts about remaining in sanctuary indefinitely. Despite Winston's calls for restraint, John executes Santino in the Continental lounge.