With the arrival of autumn comes peace at last for the O'Brien family. Or does it? The fall brings with it a small girl's visions, an incoming storm, and a season for revelations.

Finn Murphy is the luckiest of men. Married to the fierce and beautiful O'Brien sister, his devotion to Brigid and his children is unwavering. In his own family tree, he's the rare breed. The dark Irish genes emerging once a generation, seen reflected in his beloved daughter.

But Finn has a secret. One that will test his marriage and his family ties. With the return of a long-absent family member comes a choice that could change everything. When a local tragedy comes too close to home, Cora needs him more than ever. For it's in the power of three, that they'll find their strength, and he'll claim the legacy of the Dark Irish.