A knight named Lance rose up to accept the challenge - rescuing a princess that was held captive by a dragon - along with his comrades Hunk and Pidge, going on the journey to rescue this forsaken maiden. However, he doesn’t find a dangerous dragon’s keep or a princess. Lance instead finds a young man with jet black hair locked in a room in a tower. No princess anywhere.
Lance wasn’t very happy about this, leading the two to have an argument until his friends convince him to bring him along back. However, the journey back was going to be a month long trip for all of them.
As time passes, they realize how Keith has been acting strange until the truth comes out that he is the prince and the dragon. Keith was cursed as a boy, distorting his human image into a dragon creature at night. He carries a ring that he is unable to get rid of that ticks down his curse, if he doesn’t find a way to break the curse and save himself; he will be doomed to become a dragon forever.
This soon leads them to try to find a way to lift his curse before it’s too late, perhaps bring Lance and Keith more closer on this voyage.