Rishe's secret plan advances perfectly. Then, she receives an invitation from Arnold to join him on an incognito trip into town. Certain it must be for official business, Rishe goes along only to end up at a jeweler's where Arnold has a plan of his own!

Rishe has kept a certain activity of hers secret from Arnold, but when he appears right in front of her, there's no escaping his notice. Later she learns that Michel believes Arnold fulfills every condition necessary to conduct a particular experiment.

Michel has decided who he'll give his black powder to, but Rishe plans to stop him using experience from her past lives and relationships built in this life. Will she be able to convince Michel? What will Arnold do when he sees the results of her plot?