Highland and Harmony Schools need computers, but where will they get the money? What can Ace, Chriti, Miriam, and their friends do to help? They soon begin making plans. Before long they are doing odd jobs and undertaking several new business ventures. Along the way they meet new friends and make some important decisions. What they don't know is that someone is spying on them. Who is it? What does he want? The puzzling facts come to light as The Red Rag Riddle slowly unfolds.