Cassie Nightingale, the good witch, is running for mayor against her longtime friend and incumbent, Martha Tinsdale. Cassie's stepchildren, Lori and Brandon, are struggling with their own personal issues while navigating their new family dynamic. Enter Cassie's cousin, Abigail, a young witch with a chip on her shoulder and a penchant for mischief.
Abigail comes to town and immediately starts causing chaos with her magic, making people fall out of love, stirring up old grudges, and turning the townsfolk against Cassie. Lori and Brandon are taken in by Abigail's charms but quickly realize something is not right. Cassie, meanwhile, is determined to win the election and bring the town together, even as Abigail's interference threatens to tear it apart.
As the election heats up, Abigail's true motives are revealed. She harbors a deep resentment towards Cassie and blames her for a past tragedy in their family. With the help of Lori and Brandon, Cassie sets out to break Abigail's spell and bring her back to the light. Along the way, they discover that family bonds and forgiveness are more powerful than any magic.