For five years, elite demon hunter Sera sealed away her holy power and sang in a slum bar to support the man she loved. On their wedding night, Damian reveals his affair with a pureblood vampire, sells Sera to a werewolf, and prepares to have her executed.
He chose the wrong bride to betray.
Sera breaks her seal and unleashes the Siren, wielding a Holy-Light Guitar that turns monsters to ash. When the powerful Archbishop Silas recognizes her moonstone hairpin, he reveals that Sera is his daughter, lost twenty-five years ago.
But her return uncovers an even darker truth: her mother is still alive, imprisoned by a vampire prince in the frozen North. With a traitor threatening the Hunter Guild and her enemies closing in, Sera begins a deadly journey to reclaim her family, punish every betrayal, and choose her own freedom.
