The sirens have ripped Celena away from her collection of mer, leaving her exposed to the dangers of the open seas. As she fights to save her sister, the royal mermaid is forced into deadly encounters with anything that gets in the sirens' way, taking the brunt of the trauma as she tries to protect her little sister and escape the sirens' revenge.
She quickly learns that the attack on the palace in Scylla wasn't the only thing Tarni and...