Kyoshiro rescues Shizu who was being abused by her husband, even since she had been violated by the man posing as Ieyoshi. He then learned that Ieyoshi had been acting oddly ever since returning from Kyoto six months ago. Sir Fumiya's investigation of the O'oku (Shogun's harem in Edo Castle) uncovered the plot and reported that Sir Higo-no-Kami had been controlling the fraud. That's when Kyoshiro heads to Kyoto to find clues...

A detective tries to outwit a jewel thief who has kidnapped the daughter of a jeweler to get to an exquisite diamond.