Just when Finn MacCullen thought fate couldn’t kick him any harder after the events of the Festival of the Hunt, it does. Now, he must overcome a series of nearly impossible trials to prove his worth as an apprentice, or lose his place at his master Gideon’s side.

But Finn and Gideon, and their friends, are determined to boot fate right back. They’re going to do whatever it takes to succeed, including teaming up with a sorceress and a certain teen angel.

However, Finn’s life has as many twists as a Celtic knot, and master and apprentice find themselves in their ancestral homeland of Ireland with only their wits—and a fair bit of the Black Hand’s charm—to protect them from the vengeful Celtic goddess known as the Scáthach.

In this heart-stopping finale of the award-winning series, it’s going to take every scrap of Finn’s Irish luck and pluck to save himself, and his master, from death. Or worse.