In WWI, the French promised, in exchange for help against the Ottomans, that King Feisal of the Arabs would be made ruler of all of what is now Syria, Palestine, and Jordan. When they go back on their promised, Feisal is up in arms. To aid their ends, the French have forged an order from him calling for the massacre of all Jews in Jerusalem.
Jimgrim is determined to stop the bloodshed as well as the French campaign against Feisal.