In 1820, the slave ship Antelope was captured off the Florida coast. Though the slave trade was prohibited, slavery was still legal in half of the United States, and it was left to the Supreme Court to determine whether nearly 300 Africans on board were considered slaves and if so, to whom they belonged. Mining untapped archives, Jonathan M. Bryant recounts the Antelope fraught journey across the Atlantic, leading up to the momentous courtroom battle of 1825 that defined the moral and legal implications of slavery for a generation and was enormously influential in the Amistad trial.