The Hound of Uladh returns. As Conchobar Mac Neasa seeks to extend the power of Eamhain Mhacha across Eirú his Red Branch Knights become locked in conflict with the might of Queen Medb and King Ailill of Connacht. The hero, CúChulainn, is called upon to undertake a mission that will take him right to the very heart of the enemy. But not all who once fought under the banner of Uladh are ready to spill more blood for the King's growing ambitions... Meanwhile, the dark forces that linger amongst the mortals continue to spin their schemes in secret, and an old foe comes to wreak bloody vengeance upon the son of Lugh.