Gen vs Ayane
The Mugen Tenshin clan has been getting reports on a powerful martial artist who just put several of their top ninja from the Hajinmon sect into the E.R.
Genra decides to put Kasumi on the backburner (and giving her a much-needed break from being chased by ninja bent on her death) and orders Ayane to find the martial artist.
Within several days, Ayane finds her mark. Imagine her shock to find out that it is an old Chinese man with a beard and dressed in purple robes.
Gen is in Japan, visiting the hotsprings in Hokkaido, his cancer having been cured (in this plot, it is), and is recovering in the Japanese mountains.
The former assassin realises that he is being watched and demands Ayane to show herself. Ayane isn't convinced that a mere old man is the cause for alarm for her clan and deduces that a blow to the head will be enough to knock him out.
(If you have seen the first Mortal Kombat movie, think the scene when Rayden flips Liu Kang to the ground, and replace them with Gen flipping Ayane.)
Gen gives Ayane the chance to leave. Ayane refuses and prepares to fight.
Little does she know that she is in for one hell of a battle.