Mr. Socrates contacts Mystery, Inc. Butch Cassidy and the Sundance Kids are in Wittenberg investigating attacks on Catholics and Jews in the city by the Ghost of Martin Luther. They want Mystery, Inc.'s help.The team heads to Wittenberg to assist them. Things turn personal when Velma and Googie are assaulted by the ghost because they are Jewish. (Note: Velma's father is a Roman Catholic with Bavarian ancestry.) The assault causes Shaggy to turn reckless like Scrappy-Doo. How can Mystery, Inc. and the Sundance Kids avoid trouble?