American teenager Daisy is sent to live with her cousins for the summer in the English countryside. Defiant and unhappy, at first she refuses to warm to her new surroundings, but with her aunt engrossed in her role as a peace negotiator, Daisy and her cousins are left to enjoy an idyllic summer. However, their perfect world is blown apart by the sudden outbreak of war, leaving them isolated and forced to fend for themselves. When they are violently separated Daisy must embark on a terrifying journey in order to get home.