Three siblings, Marnie, Dylan, and Sophie, embark on their first magical adventure when their grandmother Aggie arrives on Halloween. Aggie wants to teach Marnie witchcraft before her 13th birthday, but a dark force is growing in Halloweentown, and Aggie needs help to defeat it. The kids follow Aggie to Halloweentown, where they soon find themselves in a thrilling quest to stop the evil with the help of Merlin's Wand.

Halloweentown
A teenage girl discovers her magical roots and joins forces with her wise and powerful grandmother to protect the mystical realm of Halloweentown from destruction.