The story revolves around a group of friends who are attending summer camp at Camp Echo Lake, a fictional camp located in the fictional town of Harmony. The friends find themselves in a scary situation when one of them, Betsy, disappears and the adults at camp seem to be mysteriously unhelpful.
While the story centers around Camp Echo Lake, Camden serves as the larger setting, providing a backdrop for the events that unfold and creating a sense of place for the readers.