Second Prince Fred, rumored for his misconduct, learns that Azami, his exclusive maid since childhood, has suddenly been married off as a concubine to the young new king of a neighboring country.

Though ostensibly a concubine, in reality, she was effectively a "hostage"...

Why was Azami forced to assume this role, one that should have rightfully been borne by a member of the royal family?

Fred, rushing to his father the king, learns the truth from his elder brother:

the unforgivable crime his father committed in the past, and that he himself had also committed a grave sin, just like his father...