If you're not familiar with ronin warriors I suggest you start YouTubing it...

In RW: an evil ronin warlord (Talpa) takes over earth and everyone but the chosen warriors lives are captured. Talpa uses a portal to enter earths realm (depicted as giant doors). When talpa is defeated all the humans come back to life and bla bla bla happily ever after....

Sounds like MK3 huh? The guy called The Ancient On elooks EXACTLY like Raiden in MK2 and ironically serves the same purpose... to guide the chosen warriors