身为大名家臣嫡子的磐音，和两位同伴在江户的任职期结束后，返回家乡关前藩。然而，刚一回到家乡，三人就遭阴谋摆布，酿成同伴杀妻斩友的惨剧。磐音奉军令斩杀同伴后心灰意冷，决定离开未婚之妻，远走他乡。打算在江户隐姓埋名地活下去。就在此时，他遇见了美丽又热心肠的钱庄女佣，阿绀姑娘。阿绀带他入住自己父亲经营的出租杂院，磐音就此开始在江户生活。然而之前家乡的那场阴谋是否早已完结，不断到来的风波又将给他带来怎样的遭遇？一切是否如烈阳折射出的浮光一般飘渺，请欣赏市井之中的这一曲江湖和歌。

Sakazaki Iwane is a ronin who spends idle days in Edo. Until a few months ago, he was a promising son and successor to a powerful family in Bungo. He has came back to Edo, where he lived for a while for swordplay training with his two best friends, after a tragedy in the three's home domain—both of the two friends died, one of them killed by Iwane by command of the domain lord's chief retainer. Iwane left his home for Edo, leaving behind his fiancée, a sister of the friend he killed. Eventually, Iwane detects the conspiracy behind the deaths of the two friends and struggles to reform his domain.

陽炎の辻「居眠り磐音　江戸双紙」。佐伯泰英さんの傑作時代小説を山本耕史さん主演でドラマ化。豊後関前藩の中老の跡取り息子・坂崎磐音は、藩政改革を目指すが、親友を上意討ちにせねばならない事件に直面する…。