Stolen bikes and a long-forgotten time capsule leave one amateur sleuth baffled and busy. Seventh grader Gabby St. Claire is determined to bring a bike burglar to justice-and not just because mean girl Donabell Bullock is strong-arming her into it. But each new clue brings its own set of trouble. As if that's not enough to handle, Gabby finds evidence of a decades-old murder within the contents of the time capsule, but no one seems to take her seriously...