When15 year old would-be inventor Roberta is invited by Leonardo Da Vinci to become his apprentice, she thinks her dreams have come true until she she realises Da Vinci thinks she is a boy and must prove her worth to challenge perceptions.

Harriet, a globe-trotting journalist from the start of the 19th century, travels in her zeppelin across the world and across the century to research and reveal the state of humanity as it comes to terms with massive changes in technology.