Sarah and Karen love to read mysteries. But Sarah is eager to start solving REAL mysteries in her own neighborhood, and there's no better place to start than Whistlethorn Manor, the creepiest place in town.

Everyone at Red Creek Public School knows that Whistlethorn Manor is haunted. And the kids at the school have long been suspicious of their classmate Tracy, who lives in Whistlethorn Manor with her ancient grandmother, whom the kids have declared "the witch of Whistlethorn." Strange things happen at that house, period. When Allison Jones, a new girl in town, fails to show up for school after last being seen going into Tracy's house, Sarah, Karen, and their band of "Red Creek Truth Seekers" know they must take action. They begin to investigate their first REAL mystery—the disappearance of Allison Jones.