Lugh and Tarte spend a full month on a deserted island as part of their assassin training and upon returning to the mainland, Maha gives them information about a divine treasure, a tool of immeasurable power, that Lugh has been trying to purchase for some time. This divine treasure, a magical spear called Gae Bolg, is in possession of Setanta MacNess, a renowned warrior suspected to become the legendary Hero. Lugh also discovers that the Viekone region is involved in a war and rushes to Dia's house, offering her a way to escape should the war reach her doorstep...