In a world where every soul carries a unique Key Tone, magic is sung through bonded weapons named conduits. Humans, elves, dragonkin, vampires, and beast-kin all vie for power, but beneath Heathermoor University lies a legendary conduit that has rejected every caster for four centuries. It's waking now, and everyone wants it.

Professor Velena Ashworth is blind, brilliant, and hiding more than one secret behind her black silk blindfold. Eighteen years ago, an accident stole her sight and exiled her closest friend. The guilt should have been hers. She's spent every day since training to become strong enough to fix the past, but when a masked plague doctor with no Key Tone at all arrives on campus fighting like he already knows her, the signal she's been waiting for might finally be back.

As the Vault stirs and every faction races to claim it, Velena must navigate academic sabotage, uneasy alliances, and the slow unravelling of her own control.