There were six elements, to which only a few selected people were Tied with. Water, Fire, Earth, Air, Electricity and Blood. All of these elements bonded together to create the magical world and maintain balance and order. Until Blood's wanted more. More power, greed and vengeance.
The Blood's used their power for evil, shaking their world into chaos and disorder, leaving nothing but destruction and despair behind them. They did anything for power and control. After hundreds of years with the Blood's being in power, the rest of the five elements formed an allegiance and swore to strip away the Blood's from power forever.
Now, decades later, the peace is restored and balance is maintained. But the rest of the Blood's are nowhere to be found.
. . . . . . .
Sienna Reed isn't what you would call a "straight A student." She gets into trouble, breaks the law (occasionally), skips class and her grades are terrible. But she makes up for it with her good and brave heart. All she wants is a normal and relaxing life, with her Mum and dog, Milo. It almost works for a brief while, until she starts having horrible nightmares and starts to hear voices.
Sienna is a Blood.
And she has no idea how to control herself and how to avoid another hundred year war.