In one evening, Rosie's life turns upside down. At an art exhibition, she finds a portrait of a girl who is exactly like her. And upon touching the painting, she finds herself in 15th-century Florence, in the art workshop of the great painter Sandro Botticelli. When Rosie returns to the present, the girl is found by the Order of Time Travelers. Someone has changed the past, and Rosie and a young man named Leo must restore the course of events. But, finding themselves in the past, young people understand that now in their hands not only the history of all mankind, but also the fate of the most powerful man of the Renaissance.