In The Crossfire *Meh, IDEK What to do With This*

Five assassins are loyal to The Organization, but particularly its Matriarch, Karen. When a change of power tears apart the empire, the five of them are pitted against each other. With the help of their instructor they have to overthrow the successor in order to survive. What will become of the two Brits, the two Japanese brothers, and the American wildcard assassins when they try to work together after being told to kill each other?
Sorry! I suck at descriptions. I've rewritten this one five times!!