该剧根据1975年James Clavell的同名畅销小说改编。故事背景为1600年的日本，当时正值一场世纪内战的黎明，即关原合战。面对五大老中的敌人联合起来对抗自己，Yoshii Toranaga大名（真田广之 饰）必须为性命而战。
　　当一艘神秘的欧洲船只被发现困在附近的一个渔村后，船上的英国引航员John Blackthorne（柯斯莫·贾维斯 饰）带来了可能帮助Toranaga颠覆权力天平的秘密，这些秘密也可能摧毁Blackthorne自己的敌人——耶稣会教士和葡萄牙商人拥有的强大影响力。
　　Toranaga和Blackthorne的命运与他们的翻译Toda Mariko（泽井杏奈 饰）变得密不可分。Mariko是一位神秘的基督教女子，来自没落贵族血脉的最后一位家族成员。在政治局势动荡的时代，Mariko不仅要为她的大名服务，还必须在自己与Blackthorne建立的新关系、对信仰和先父遗愿的使命感之间找到平衡点。
　　原著通过西方和日本两个角度来讲述，背景设置在日本的江户幕府时代，原型是德川家康和三浦按针。

　　In Season Two of The Rings of Power, Sauron has returned. Cast out by Galadriel, without army or ally, the rising Dark Lord must now rely on his own cunning to rebuild his strength and oversee the creation of the Rings of Power, which will allow him to bind all the peoples of Middle-earth to his sinister will. Building on Season One’s epic scope and ambition, the new season plunges even its most beloved and vulnerable characters into a rising tide of darkness, challenging each to find their place in a world that is increasingly on the brink of calamity. Elves and dwarves, orcs and men, wizards and Harfoots… as friendships are strained and kingdoms begin to fracture, the forces of good will struggle ever more valiantly to hold on to what matters to them most of all… each other.

　　跟随格雷斯一家，他们搬进了祖居，揭开了关于他们的曾叔祖父的黑暗秘密，他发现了与他们平行的秘密精灵世界。