One sunny, spring day during finals week, sixteen year-old Julian Harrington learns his long-lost mother is dead, and he and his younger brother, Jacob, will finally be reunited. Having not seen each other in ten years, the boys are swept off to Ireland where Aunt Molly, Uncle Liam and the rest of his mother's huge extended Finnegan family live in the stone castle they call Finnegan's Close. Julian and Jacob discover the magical abilities they were born with and undergo the family's training to harness their Finnegan Gifts. But their journey takes a perilous turn when a sinister and deranged villain catches wind of their powers and becomes obsessed with stealing them for his own nefarious purposes. In a high-stakes battle of wits and magic, the boys - and their entire magical Finnegan family - must figure out a way to thwart him, while keeping their magic a secret.