A red-haired princess loses her family and her kingdom. Now she must rise and fight for her throne! 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! The Chalice of the Four Dragons' Blood unexpectedly claims both Yona and Zeno! The two reunite with Jaeha, Gija, and Sinha in the world within the chalice. They try to escape together, but the dragon gods won't let them go that easily.