Branwen Daughter of Llŷr follows Branwen's marriage to the King of Ireland, who abuses her due to insult by her half brother, Efnysien.
Math Son of Mathonwy is a dark sequence of deception and treachery: war with Dyfed, the death of Pryderi, the double rape of a virgin girl, and the rejection of an unwanted hero son by proud Arianrhod.