Cruel anonymous letters are being sent to people all over Raven Hill, and the victims are frantic. Elmo and the rest of the Teen Power gang are determined to unmask the letter-writer and stop the flow of vicious threats that are ruining so many lives. But the more they investigate, the more the mystery deepens.
Who is the shadowy figure called The Eye? How can the ruthless poison pen writer have discovered so many guilty secrets? And why does Elmo keep feeling that behind this puzzle lurks something even more sinister?