The kingdoms of Connacht and Ulster are preparing to do battle with each other. Medb, the sly and envious Queen of Connacht, is on a mission to steal the fabled Brown Bull of Cooley from the men of Ulster. The Ulstermen, crippled by an ancient curse, face defeat from her armies, until a hero emerges in the shape of the warrior Cu Chulainn: a man of superhuman strength and supernatural powers. Through guerrilla tactics and great chariot fights he manages to defend his province and hold off the Connacht army - until Medb tricks him and it seems victory may come at a bitter price.