When evil warlock Desmond Spellman vows to destroy Wendy the Good Little Witch, she and her witless witch aunts hide out at Sunny Brite Resort, where the vacationing Ghostly Trio has been busy scaring up mega-mischief - and making Casper's afterlife miserable. Even though Casper and Wendy are told that ghosts and witches just don't get along, when these two kindred spirits meet, it's the beginning of a boo-tiful friendship. But Desmond is closing in...and time is running out. Now Casper and Wendy must prevent a supernatural showdown between their feuding families in order to defeat Desmond's dastardly plan.