THEIR PROMISE

Alex Forbes is a witch and a vampire hunter who only hunts them when she has to because it's part of her nature. But as time passed by she got use to them because of her sister Caroline Forbes who was one of them.

She was sent in prison world by her sister's ex boyfriend Stefan Salvatore. He accused her of killing a thousand of innocent people including Elena Gilbert who was nowhere to be found.
Alex wasn't the only prisoner there and when she met Kai and Katherine things started to getting better. Or should I say fun and complicated?