Mariana, Maria for short, is a spy for the renegade crew she is smart young, talented and unnaturally beautiful, but she hides a secret from her entire crew. She keeps her true identity hidden with her two bracelets, without them, her scales show. No clue still? She's a siren and so was her sister who she lost thanks to one person. She vows revenge to the people who killed her sister and this is her story.