 Caith grows up believing that Gaelan is his father and when he learns that Sliabhin murdered Gaelan, and that he has a younger brother, now in Sliabhin's hands, he returns to revenge his father's death and rescue Brian.As he passes through Gleann Gleatharan, he is told that Sliabhin raped Moralach and is his real father; this increases his resolve to rid Dun Mhor of Sliabhin and free Brian.Cinnfhail, uneasy that Caith's meddling may disturb Gleann Gleatharan's peace, reluctantly lends Caith his fay horse Dathuil.