Marnie, Dylan, and Sophie Piper have their first out of many adventures! On Halloween, while Marnie is arguing with her mother Gwen, the kids' grandmother Aggie comes to visit. Aggie wants to start Marnie's witch training before her 13th birthday or Marnie will lose her powers forever. But there is another reason for Aggie's visit. Something dark and evil is growing in Halloweentown and Aggie wants help to defeat it. While Aggie and Gwen are arguing, Aggie uses magic which Marnie observes. After Aggie leaves to return to Halloweentown, Marnie, Dylan and, unknown to Marnie and Dylan, Sophie follow her onto the return bus. Soon afterwards, Gwen follows the children to Halloweentown. While there, Aggie and Gwen are attacked by the dark force in a movie theater. Marnie, Dylan and Sophie race to get the ingredients to activate Merlin's Wand to stop the evil. Written by LepricahnsGold and Corey Semple Superman2002

The Cromwell clan live in the real world, except for their grandmother who lives in Halloweentown, a place where monsters go to escape reality. But now the son of the Cromwells' old enemy Kalabar has a plan to use the grandmother's book to turn Halloweentown into a grey dreary version of the real world, while transforming the denizens of the real world into monsters. Only Marnie, a fledgling witch, can thwart the evil scheme. Written by crow_steve@hotmail.com