Scooby-Doo and Shaggy must go into the underworld ruled by the Goblin King in order to stop a mortal named The Amazing Krudsky who wants power and is a threat to their pals, Fred, Velma and Daphne.
博士查理（大卫•休默 David Schwimmer 饰）最近遇到了麻烦。不仅丢掉了大学里的工作，自己写的书也出版无望。为了不成为家里的负担，查理找到了份电话销售的工作，在那里认识了自来熟的同事加斯（西蒙•佩吉 Simon Pegg 饰）。加斯告诉了查理他的计划，即敲诈一位经常浏览色情网站的牧师。为了让家人过上富足的生活，查理答应加入，再加上加斯…
After living peacefully in the caverns of a small town, a stranded group of aliens turn deadly as they fight for their existence, betraying the compassionate chief of police who has protected them for 28 years.
