When Will and Bet were four, tragic circumstances brought them to the same house, to be raised by a wealthy gentleman as brother and sister. Now sixteen, they've both enjoyed a privileged upbringing thus far. But not all is well in their household. Because she's a girl, Bet's world is contained within the walls of their grand home, her education limited to the rudiments of reading, writing, arithmetic, and sewing. Will's world is much larger. He is allowed--forced, in his case--to go to school. Neither is happy.

So Bet comes up with a plan and persuades Will to give it a try: They'll switch places. She'll go to school as Will. Will can live as he chooses. But once Bet gets to school, she soon realizes living as a boy is going to be much more difficult than she imagined.