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!

In order to free the port town of Awa from an evil tyrant, Yona and her friends team up with Jaeha, the Green Dragon, and his fellow pirates. While Hak and the others are fighting Yang Kum-ji's forces, Yona and Yun infiltrate a human trafficking operation! When the enemy closes in and things look dire, what will Yona do?