In this broadly comic account of a tragic story, an enslaved 12-year-old boy is freed by John Brown, mistaken for a girl, and spends the next few years enmeshed in Brown's plans for an uprising to end slavery. Henry, aka Onion, is focused mainly on his own survival and definitely not on heroism. By the inevitable end, his attachment to Brown gives emotional resonance to a death that forced a nation to face its sins.