Mexico, 1683. When Concepción Benavidez flees her indenture from the convent of San Jerónimo in Mexico City and sets out to join a band of refugee slaves along with her friend Aléndula, the two are captured by buccaneers in Vera Cruz led by the famed Laurens-Cornille de Graaf, who is running a slave- and provisions ship headed for New England. Aléndula dies on the journey, but Concepción, upon arrival, is renamed Thankful Seagraves and sold to a Boston merchant, Nathaniel Greenwood, who plans to have her care for his crippled father-in-law and manage the Old Man’s chicken farm. Delirious, half-starved, and terrified by her ordeal on board the Neptune, during which the Captain raped her repeatedly, Thankful Seagraves gives birth to a daughter, coveted by Rebecca, Nathaniel's fallow wife, and over the next eight years struggles to adapt herself into English colonial life. With great difficulty she attempts to raise her daughter in the faith and language of New Spain and thus forge a connection between herself and the girl even while Rebecca slowly turns Hanna against her. Like her friend, Tituba Indian, Concepción is a perpetual outsider—her mixed-race looks as well as her accent and her Catholic background set her apart—and before long she gets swept up in the hysteria of the Salem witchcraft trials of 1692, culminating in a shocking accusation by her own daughter, who renounces her mother and declares her a witch.