Fleeing his violent master at the side of abolitionist John Brown at the height of the slavery debate in mid-nineteenth-century Kansas Territory, Henry pretends to be a girl to hide his identity throughout the raid on Harpers Ferry in 1859.

Henry is a young slave living in the Kansas Territory in 1857. When his master has a violent argument with John Brown, the legendary abolitionist, Henry is forced to leave town with Brown, who believes he is a girl. Concealing his true identity as he struggles to stay alive, Henry is swept up in the events at the historic raid on Harpers Ferry in 1859.