Princess Yona lives an ideal life as the only princess of her kingdom. Doted on by her father, the king, and protected by her faithful guard Hak, she cherishes the time spent with the man she loves, Su-won. But everything changes on her 16th birthday when tragedy strikes her family!

Kang Su-jin, chief of the Fire Tribe, has been plotting to become the ruler of the Kingdom of Kohka--and now he's started an uprising by attacking Su-won at Hiryuu Palace! As the armies clash on the battlefield, will Yona and her friends join the fray with so much on the line?!