We are in T.A. 1309. A few centuries ago, Arnor, the Northern Kingdom of the Dunedain in exile, was dissoluted and succeded by 3 states; Arthedain, Cardolan and Rhudaur, struggling to seize the power of the once might Kingdom of Arnor with civil wars and numerous battles.
In T.A. 1300, the Witch-King, the Leader of the 9 Nazgul, ordered by Sauron himself, founded the Realm of Angmar, to the North of the 3 Kingdoms. Ally to Rhudaur, who was governed by Wicked Men of dubious origin, he was targeting in the end of the Dunedain of the North.
Will his evil purpose be fullfilled, or he shall be overthrown by the Men of the West?