After Breanna Ban Morna frees her Chief but fails to slay her Norse father, Ćroí Dàn joins Erin's Hero. The Heart of Destiny leads Erin's Hero and her warriors to seek out Lia Dàn while evading the Dreadlord's pursuit. With the support of her Tuatha Gods and their Druids, Breanna must once more battle Fomorian demons to reach a portal that will take them to the magical land of Tír na nÓg, called Falias by the Tuatha, where the Stone of Destiny lay in the Mother Goddess Danu's hands.

Having acquired the Stone of Destiny, Breanna returns to Erin with a blessing from All-Father to seek the place where she must wield the Tuatha destiny-shaping magic, a place defended by the Dreadlord. While her band of warriors battles the Norsemen, Erin's Hero uses an invisibility cloak provided by Dagda to bring the magical Triple Dàns to Erin's Altar, wielding them to remove her father and his ilk from her land, a feat that would warp the Emerald Isle's fabric of time—and claim Breanna's soul!

Could a warrior in ancient times change Ireland's timeline to ensure Gael's will rule? It would take a Hero and the Tuatha Gods who back her to make that happen! Welcome to Destiny Cycle!