Sinopsis
Top assassin Kieren is betrayed and nearly drowned, rescued by thousand-year-old siren Caspian. Caspian brands him with a symbiotic mark healing wounds yet linking them. Hunted by a villain researching sirens, they grow wary to devoted. After defeating the foe, Caspian removes the mark, gets Kieren’s confession, unveils his true form and proposes, defying merfolk taboo for eternal companionship.