Marnie finds out that there is another world just like Halloween Town but a bit different then theirs. Her grandmother Aggie tells her and her two younger siblings Dylan and Sophie that there is a king she knew very well name Jack Skellington. When a warlock name Jared Stems and his grandson Friday comes and tells Aggie that Kal their mortal enemy is planning for attack on Halloween Town. In another world. Can Marnie, Aggie and Sophie stop him on time? Find out.