鬼怪岛是一家以恐怖灵异为主题的游乐园，然而，某一日，这里却真的出现了灵异事件，导致顾客们纷纷四散奔逃，游乐园门可罗雀。游乐园老板找到了沙奇（马修·里沃德 Matthew Lillard 饰）和他的大狗史酷比（Neil Fanning 配音），希望他们能够前来降妖除魔。 在机场，沙奇遇见了久违的弗雷德（小弗雷迪·普林兹 Freddie Prinze Jr. 饰）、威尔玛（琳达·卡德里尼 Linda Cardellini 饰）和蒂芙尼（莎拉·米歇尔·盖拉 Sarah Michelle Gellar 饰），曾经因为意见不合而分道扬镳的四人再度聚到了一起。在游乐园中，沙奇一行人遇到了有史以来最大的危机，并最终发现游乐园闹鬼的幕后黑手正是老板本人，他的阴谋究竟是什么呢？
Plot Summary:The Mystery Inc. gang have gone their separate ways and have been apart for two years, until they each receive an invitation to Spooky Island. Not knowing that the others have also been invited, they show up and discover an amusement park that affects young visitors in very strange ways. Fred, Daphne, Velma, Shaggy and Scooby soon realize that they cannot solve this mystery without help from each other.
