This novel tells the origin story to Freeform's hit drama series "Siren." The story is set in Bristol Cove, back when the area was a truly remote frontier, with Victorian-era mermaids. Charles Pownall, grandfather to Ben, the protagonist on the show, is injured on his ship and falls overboard. In the depths of the ocean, he hears a haunting song and opens his eyes to find an angel hovering before him. While he recovers, he is determined to find the creature he met in the deep. The relationship that develops is gripping and dangerous and romantic, providing backstory and texture to the story and relationships explored in the Freeform series.