Yona is the sole princess of the Kingdom of Kouka, living a luxurious and carefree life as a princess should. She has it all: the finest clothes and cosmetics, the most divine sweets, a loving emperor as a father, and the hottest cousin crush, Soo-won, any girl could ever hope to have. Now, if only her bodyguard, Son Hak, weren't so annoying towards her, and if her hair weren't so red...
But her nearly perfect world quickly shatters as the man she loves, Soo-won, murders her father and the path to his ascension to the throne is assured. Son Hak escapes with Yona, and they lead a life on the run from that point on.