Onion and Bob get separated from the Brown party. Because Onion's skin is so light, he pretends to be white, and that Bob is his slave. Hoping to reach the abolitionist town of Tabor, Iowa, where John Brown and his sons were headed, they are taken, not happily, across the Missouri River to the fictional slave-trading town of Pikesville, Missouri; Bob is put to work in a sawmill, and Onion cleans rooms in the Pikesville Hotel. Onion is central to a planned insurrection of slaves to enable them to escape. The plan is discovered, and 9 slaves about to be hanged are rescued by John Brown and his troop, who arrive with guns and a cannon.
