With her flaming red hair and emerald green eyes, Xenia?s unusual beauty makes her stand out in any crowd, until she unexpectedly meets her long-lost cousin, Johanna, amidst the wreckage of a railway accident. Incredulous at finding her mirror image and desperate for a friend, Xenia?s initial joy is soon replaced by misgivings when Johanna suggests an outrageous plan to swap lives for two weeks. Xenia finds herself agreeing to help Johanna enjoy 10 final days of freedom with the Englishman she loves before her arranged royal marriage. As her cousin steals away from the site of the train crash, Xenia suddenly realises all that impersonating Johanna, even for a short while, will entail travelling to meet and marry her fiancé, King István of Luthenia, and the journey must continue so suspicions are not aroused. Arriving in Luthenia, Xenia is instantly plunged into a world of political intrigue and drama a million miles away from the quiet life she previously enjoyed in the English countryside.