In Cú Chulainn's youth he is so beautiful the Ulstermen worry that, without a wife of his own, he will steal their wives and ruin their daughters. They search all over Ireland for a suitable wife for him, but he will have none but Emer, daughter of Forgall Monach. However, Forgall is opposed to the match. He suggests that Cú Chulainn should train in arms with the renowned warrior-woman Scáthach in the land of Alba (Scotland), hoping the ordeal will be too much for him and he will be killed. Cú Chulainn takes up the challenge, travelling to her residence "Dún Scáith" (Fortress of Shadows) on the Isle of Skye. In the meantime, Forgall offers Emer to Lugaid mac Nóis, a king of Munster, but when he hears that Emer loves Cú Chulainn, Lugaid refuses her hand.