The Secret Workshop

While helping her parents organize items at a museum in Greece Reeya Rai finds some paintings made by a medieval artist and inventor from India. When Reeya learns that artists sometimes hide secret messages in their paintings Reeya creates a special color-wheel to study the artist's paintings. In them she finds clues to the location of the inventor's secret workshop! Unfortunately to access it Reeya needs a small artifact currently held by her nemesis Elsie Acker. Will Reeya find a way to get the artifact from Elsie without alerting Dr. Acker to the workshop's location?