Rhiannon Lewis doesn't make much of an impression - she's continually overlooked for a promotion at work, the guy she likes won't commit, and her dad is really sick.

Then one day Rhiannon is finally pushed over the edge and loses control. The wallflower is gone, and in its place is a young woman capable of anything... Rhiannon's life transforms as she steps into a new, intoxicating power, but can she keep her killer secret?