John reluctantly travels to Rome to complete the mission but is quickly betrayed by Santino, who places a on his head to tie up loose ends. Hunted by a global network of assassins, including Gianna's loyal bodyguard Cassian and Santino’s mute enforcer Ares, John returns to New York to seek revenge.
: The society is governed by two unbreakable rules: every marker must be honored, and no blood may be shed on Continental grounds. John Wick - Capitolo 2
The film culminates in a violation of the underworld’s most sacred rule: . John reluctantly travels to Rome to complete the