I have absolutely no idea how they pulled this off.
A vampiric Keanu Reeves (how old is he? No really??) punches, shoots, knifes, kicks, car slams, sign gestures, annoying mid screen über stylized sub dodges, one lines and sprint-shoots his way through a plethora of inept and not so inept fellow hitmen who all want a piece of his glorious ass.
There is no real plot, just the 'How to make an action film' rulebook.
And it bloody well works…