Seventeen centuries ago, three sisters set the course of their people after the brutal murder of their mother, the Elder Alpha, at the hand of the Faoladh. With the combined force of all three Elder clans, the sisters destroyed the Faoladh's physical being, but without the help of their mother, they were unable to eradicate his spirit, and though he has not been seen since, his presence is felt throughout every forest and haunts the conroicht that protect them. Six months before their Sealing Day, Saoirse and Moira Conall wake to discover they've been Sealed too soon, a rare - and deadly - occurrence that has only been recorded once before since the creation of the conroicht. As their mother, Alpha of the Ròisìn Clan, and the Great Elder Council frantically struggle to make sense of it all, the twins prepare to face the biggest decision of their lives: almost certain death, or forfeiting their birthright and losing their status and abilities as conroicht. The only two heirs of an uncontested Alpha line, Saoirse and Moira risk destroying a seventeen century old pure Alpha line if neither of them can complete their first Transfiguration, but the next full moon is a lunar eclipse, which makes it nearly impossible for new wolves to complete their first Transfiguration. As the girls prepare, Saoirse begins having visions of an ancient darkness that threatens the lives of every living conroicht, and an unseemly ally makes his way into her life. With threats at every side and demise seeming to shadow their lives, will the sisters be able to overcome the daunting tasks that lay before them?