While battling her own demons, Detective Olson is determined to catch a sadistic killer. The only clues left behind are the victim's bloody remains and the sole survivor, a 17 year old boy. While they try to determine why the boy's family was targeted, the boy begins to question human nature, and the evil that could be lurking deep inside us all.

While trying to prove to her family she can be mature and responsible, teen wizard Alex Russo conjures up a spell to rid herself of her bad qualities, unintentionally creating a Good and Evil Alex. When Evil Alex gets involved in a plan to take over the world by a dark wizard, Good Alex must find a way to save her family, humankind, and ultimately herself in an epic Good vs. Evil battle.