Ivian is different. So different that she can't be referred to as human. She's a Siren. When she tries to live her old human life as a succubus, she learns the hard way that things can never be the same again. Enter a world where all the boundaries you know of the world have disintegrated. Where Siren's roam the Earth. Where secrets are kept. Where memories are erased. Where people will do anything to stay alive, or keep the ones they love alive. Enter a world where everything revolves around music. Enter the world and hear the Siren's Song.