When the SGC's Arcadian allies are threatened by the System Lord Susanowa, they feel bound to aid them. Set during Season 6.
Aided by their allies of the Tau'ri and Tok'ra, and by the Free Jaffa, the people of Arcadia seek to defend themselves against an invasion by the forces of the Goa'uld Susanowa.
Susanowa and Niningi launch their terrible assault on Arcadia. The Thebans are besieged by the relentless and their only hope may be the equally merciless Jaffa who once served the Goa'uld Astarte.
The SGC seek to protect Arcadia from Izanami's revenge by stirring up revolution on her fortressed homeworld, Yomi. This daring plan might just work, but only if an old enemy does not interfere.
The situation on Yomi grows more complicated as Anubis launches a bid to seize the military might of the daimyo Goa'uld and betrayal and deception sow their deadly seeds among the ninja.
The Way of the Warrior - Bushido - was the philosophical code followed by the samurai of feudal Japan. Growing from its roots in the unwritten rules of battle, it blossomed in the relative peace of the Edo period. The development of Bushido from rules of engagement to complete, all-consuming lifestyle was encouraged by the Shogun in order to give the unemployed warrior aristocracy of his country something to do besides rebelling.
Those who serve is the literal translation of the word samurai. Stealth, patience and perseverance are various translations of the Japanese kanji 'nin'; the root of ninja.
For more information go here and here.
For reference purposes, I have created a page of background information on Arcadia.