John Wick, an ex-assassin, returns to the criminal underworld to settle a debt. However, he soon finds himself targeted by a large bounty. As he fights his way through henchmen and double-crossings, John must protect himself and his dog while trying to find a way out of the deadly game.

After the death of his wife, retired hitman John Wick receives a puppy as a final gift. When his car is stolen and his puppy is killed, John seeks revenge on the young gangster responsible, unleashing a wave of violence against the criminal underworld.

John Wick is on the run after killing a member of the international assassins' guild, and with a $14 million price tag on his head, he is the target of hit men and women everywhere. As he fights his way through New York City, he seeks refuge and assistance from old allies and confronts powerful figures within the secret world of assassins.

John Wick prepares to exact vengeance against the High Table while hiding with the Bowery King. He travels to Morocco, kills the Elder, and faces retaliation. He seeks refuge at the Osaka Continental but the High Table comes for him. John fights through waves of assassins, forms alliances, and seeks revenge against those who betrayed him. He challenges the Marquis to a duel and eventually kills him, gaining his freedom and rebuilding the New York Continental. John reflects on his life before succumbing to his injuries. In a post-credits scene, a vengeful Akira confronts Caine.