The story unfolds in modern-day Maine. Adrian Blackwell, heir to the powerful Blackwell dynasty, is betrayed by his father and cast off the Black Cliff. Near death, he is rescued by Seraphina—the last Siren of the North Atlantic. She saves his life by offering her "blood of origin," a sacrifice that costs her the voice she will never regain. Adrian brings the voiceless Siren to his estate, and a tender romance blossoms between them.
However, the scheming Victoria witnesses everything; she steals Seraphina’s pearl pendant and falsely claims to be the one who saved Adrian. Deceived by this lie, Adrian demotes Seraphina to the status of a servant. Seven times, he drains her blood to preserve Victoria’s beauty; he breaks her spine and ultimately abandons her in a blizzard to die.
Only after she perishes does Adrian learn the cruel truth. He punishes Victoria ruthlessly and resorts to forbidden magic in a desperate attempt to resurrect Seraphina, only to discover that the young woman’s soul has already shattered. Overcome with inconsolable grief, Adrian leaps from the Black Cliff; his soul sinks into the freezing ocean, vanishing forever alongside his Siren love.