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剧情：
ThePotterfamilyhasjustmovedtoarentedapartmentinSanFrancisco.HarryPotterSr.andhiswifeAnnearebringingthepackagestotheapartmentandtheirsonHarryJr.andtheirlittledaughterWendyAnnestaysonthesidewalk.Wendygoestothelaundryroom,shemeetsthewickedtrollTorokthatuseshismagicringtopossessWendyandtouseherformtotransformthedwellersandtheirapartmentintoothertrollsandhiskingdom.HarryJr.feelsthatsomethingiswrongwithhissisterandseeksouthelpwiththegoodwitchEuniceSt.Clairthatlivesinthebuilding.