Tom Sawyer's and Huckleberry Finn's adventures are legendary, but what about the story you haven't heard? In 1860, 11-year-old Becky Thatcher is the new girl in town, determined to have adventures like she promised her brother Jon before he died. Before long, she joins the boys at school in a bet to steal from the Widow Douglas, and Becky convinces her new best friend, Amy Lawrence, to join her. But the theft doesn't go as planned, and Widow Douglas ends up being unfairly accused of grave robbing as a result. So Becky concocts a plan to clear the Widow's name. If she pulls it off, she might just get her Mama to notice her again. That is, if that tattletale Tom Sawyer will quit following her around.