In a world of shadows and blood, loyalty is as deadly as betrayal.

After her eighteenth birthday, Bria Allen finally takes her oath as an apprentice assassin at the Assembly of Shadows, a vampire coven created to protect humans from vampires who mercilessly prey on them.

When her best friend disappears and a string of deaths follows, the oath she swore is tested in ways she never expected. Suspecting someone within the Assembly is responsible, Bria searches for answers and uncovers disturbing secrets surrounding her brother’s banishment instead—secrets that suggest her coven may be hiding a darkness far greater than she imagined.

On a mission to uncover the truth, her only ally is the mysterious Xander Ivyhn, the Chosen she selected during her oath ceremony. But not even he can stop her from making a deadly decision, feigning loyalty to the one person she cannot afford to deceive, Sava Herstoj, the Assembly’s feared Supreme Leader.

Bria must survive deadly missions, navigate a web of lies, and uncover the truth before her deception is revealed or she will be annihilated for treason.

Because in the Assembly of Shadows, the greatest danger may not be the monsters they were trained to kill—but the ones who taught them how.