In Monroeville, Alabama, Tru and Nelle are considered oddballs. Nelle's tomboy and Tru's just strange. But Tru and Nelle don't care. They're best friends and don't need any others. Their favorite game is pretending to be Sherlock Holmes and Watson, and they're always looking for a real life mystery to solve. Tru and Nelle find one when someone breaks into the drugstore. But what starts as…