Film Story :
After John Wick (Keanu Reeves) loses his wife Helen (Bridget Moynahan) to a terminal illness, he receives a puppy named Daisy, per Helen's instructions, to help him cope with her death. He connects with the puppy and they spend their day driving around in his vintage 1969 Ford Mustang Mach 1. At a gas station, he encounters a trio of Russian gangsters whose leader, Iosef Tarasov (Alfie Allen), insists on buying his car, but John refuses to sell it. The mobsters follow John to his home that night, knock him unconscious, steal his car, and kill Daisy. Iosef takes the Mustang to a chop shop run by Aurelio (John Leguizamo) to have the VIN changed. Aurelio recognizes the car and, upon learning that Iosef stole it from John, punches him before throwing him out of his shop. John visits Aurelio, who tells him Iosef is the son of Viggo Tarasov (Michael Nyqvist), the head of the Russian crime syndicate in New York City. Viggo, informed by Aurelio of Iosef's actions, beats and berates Iosef, explaining to him that John Wick was his best assassin, nicknamed "Baba Yaga." When John wanted to retire and marry Helen, Viggo gave him an "impossible task": killing all of his competitors in a single night. John succeeded, establishing the Tarasov syndicate. Viggo tries to talk John out of seeking retribution, but John silently refuses. Viggo then sends a twelve-man hit squad to John's house, but John kills them all and has the bodies professionally removed. An unsurprised Viggo places a $2 million bounty on John's head and personally offers the contract to Marcus (Willem Dafoe), John's mentor. John seeks refuge at the Continental Hotel, which caters exclusively to the criminal underworld and permits no "business" on its premises. Viggo doubles the bounty for those willing to break the rules to kill John at the Continental. John learns from Winston (Ian McShane), the Continental's owner, that Viggo has Iosef protected at his nightclub, the Red Circle. John enters the Red Circle and kills his way to Iosef, but Iosef escapes. John retreats to the Continental to treat his wounds. Ms. Perkins (Adrianne Palicki), an assassin and former acquaintance of John's, sneaks into John's room to kill him, but Marcus warns John. John subdues Perkins after a brutal hand-to-hand fight and forces her to reveal the location of Viggo's front. John knocks Perkins unconscious and leaves her with fellow assassin Harry (Clarke Peters) to await punishment. However, Perkins frees herself and kills Harry. John travels to the Little Russia church which serves as Viggo's front and destroys Viggo's cache of money and blackmail material. When Viggo and his team arrive, John ambushes them, but he is subsequently captured. Viggo taunts John for thinking he could leave his old life behind. Marcus intervenes, allowing John to free himself and accost Viggo. At gunpoint, John forces Viggo to reveal Iosef's location. John then travels to Iosef's "safe house" and kills him. Perkins sees that John and Marcus have been in contact and tells Viggo, who has Marcus tortured and killed in his home. Viggo calls John to report the killing, planning to have Perkins ambush John. Perkins, however, is called to a meeting with Winston, who has her executed for breaking the Continental's rules. Winston calls John to inform him that Viggo is planning to escape by helicopter, and John races to the harbor, killing Viggo's remaining henchmen before engaging Viggo in a fistfight on the dock. Viggo pulls a knife and John allows himself to be stabbed, surprising Viggo. John then disarms and fatally wounds Viggo. Wounded himself, John stops at a waterfront animal clinic to treat his wound and takes with him a pitbull puppy which was scheduled to be euthanized. John and the dog walk home on the boardwalk where he had his last date with Helen.