A new and dangerous magic. A promise to the faerie king. A musical treasure map no bard can decode.

With the darklings gone, the kingdom of Dúramair is no longer under threat. But the Trianid remains splintered, and behind the walls of Monstar Abbey, the Seer of Strands harbors two secrets: a seemingly destructive magic rising within her and a promise to the faerie king that must be kept.

When Faer Dinnán appears to see the promise fulfilled, it ensnares the young Trianid in an adventure that will test the limits of both their magic and their bonds. But even as Lirianna hopes her efforts will strengthen the Trianid, her own destiny as the Seer of Strands becomes increasingly tenuous. Fearing for a future her secrets could destroy and confronted by a past she thought she left behind, Lirianna can no longer ignore her growing magic-or the consequences of using it.