It’s only chapter two and the story of John Wick is getting stale. The 2014 film that introduced us to the legendary hitman established an appealing, stylized society of modern assassins operating with well-defined rules. John Wick also worked because it was an energetic, inventive, straight-ahead revenge actioner with some emotional stakes. Chapter 2 builds on the mythology but lacks the inertia, wit, and significance of its predecessor. When Wick isn’t dispensing headshots with impunity the sequel has trouble sorting out its plot and zeroing in on a point.