When Katy is assigned a history project on World War Two, she moans and groans with the rest of her class. Work? During half term? Simply not fair! But when Katy and her brother wake to find them themselves in 1940s England, school projects are pushed far from their minds. Can Katy change the course of history and prevent the tragic death of a little girl in a terrifying air raid? And can Katy and her brother make it back home?