In an alternate history Kyoto where electricity still fails to outpace steam power by the start of the 20th century, tinkerer Kihachi Sakamoto crosses paths with the gullible Inako Momokawa, whose family has come into the possession of Kichachi’s missing brother’s journal. Within the pages of this catalog, secrets are contained that could spark a scientific revolution — but our heroes are not the only ones who have realized its significance…