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!

Yona finally meets Jaeha, the Green Dragon. Unfortunately, Jaeha has no desire to follow her on her quest! Yona offers to help Jaeha and his fellow pirates, so Captain Gi-Gan challenges her with a perilous quest to test her courage. Will Yona be able to pick the Senju Herb from the steep cliff face of the Vanishing Cape?