Royal heir Brianna Brannon rescues the dying merman Bryce from the Abyssal Exchange, risking her own sight to test his medicine. But Bryce mistakes her quiet kindness for control and sends his younger brother Blade to impersonate him. The deception backfires when Blade reveals himself, earns Brianna’s trust, and falls for her. As Bryce’s regret grows and the corrupt Exchange turns violent, Brianna fights to protect both merfolk and reform the system. After Blade risks his life to save her, Brian
