In 1600 Japan, on the cusp of an internal conflict that would define the century, John Blackthorne, an English captain at the helm of an enigmatic ship left abandoned on the coast of a nearby fishing village, holds secrets that could favor Lord Yoshii Toranaga, engaged in a fight for survival against his opponents on the Council of Regents. It could also weaken the influence of Blackthorne's enemies, the Jesuits and Portuguese merchants. The destinies of Toranaga and Blackthorne will be inextricably linked to their interpreter, Toda Mariko, a mysterious Christian of noble lineage, the last of a family fallen from grace. While serving her lord in this tense political environment, Mariko will have to juggle her relationship with Blackthorne, her devotion to the faith that saved her and a daughter's duty to her lost father.