The crucial clue
Pipa had been going door to door, asking questions at every house, but she was coming up empty-handed. No one seemed to have noticed anything unusual, and frustration was beginning to set in. Just as she was about to give up and head home, she heard someone call her name from across the street.
One of her closest neighbors was waving her over. He had apparently caught wind of what she was up to and had been meaning to speak with her. His expression was serious, and Pipa’s heart started to race—was he about to tell her something important?
