In 1863, as the age of the samurai draws to a close, sword spirits given human form by a sage called the Saniwa fight to protect history from an army of revisionists sent back to rewrite it. Among them, the courteous Horikawa Kunihiro and the short-fused but skilled Izuminokami Kanesada anchor a roster of blade-warriors defending key historical turning points. This manga adapts the Katsugeki/Touken Ranbu anime, one branch of the wider Touken Ranbu franchise.