Terry works for a bank, and uses computers to communicate with clients all over the world. One day, she gets a strange coded message from an unknown source. After decoding the message, Terry becomes embroiled in an espionage ring. People are killed, and Terry is chased. Throughout, she remains in contact with this mysterious person, who needs Terry's help save his life.

In 1839, the slave ship Amistad set sail from Cuba to America. During the long trip, Cinque leads the slaves in an unprecedented uprising. They are then held prisoner in Connecticut, and their release becomes the subject of heated debate. Freed slave Theodore Joadson wants Cinque and the others exonerated and recruits property lawyer Roger Baldwin to help his case. Eventually, John Quincy Adams also becomes an ally.