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.