Purple-eyed Adarte, blue-eyed Adolte. One enveloped in light—the graceful son; and one shrouded in darkness—the prisoner. Destined to walk different paths in a kingdom where a beautiful man is lauded as a hero while his enigmatic assistant toils to support him...

Dao and Shao are twin brothers of a nomadic tribe. Shao is the ideal son, the light of the clan, while the sickly Dao can only aspire to what his brother has. As the days count down to the ritual of Malaukai where their family successor will be decided, a tragic accident alters the twins’ fate forever…

Having left his tribe and taken his brother’s name, Dao serves as the king’s aide, burdened all the while by orders to deceive him. However, the king has secrets of his own. In his childhood days as the crown prince, he led a lonely life as his father suffered from illness. Then, with the arrival of his half-brother, Magrev, a tale of love, hate, and the whims of fate began to unfold…

美しき「月光王」の皇太子時代。父王が病に臥せて3年、母を亡くし孤独に過ごす皇太子のもとに、異母弟のマグレブがやってくる。マグレブは兄と親しくなりたいと願うが、皇太子は、いずれ生贄として弟を利用しようと企んでいた。侍女のドビーをめぐり兄弟の関係が歪み始める中、父王の危篤の時が来る。

「月光王」と呼ばれるシャリバルテ王国の若き王は、隣国への侵略戦争を始め、海沿いの王国ペアンの幼い王女オルガを妃にする。王の無礼な振る舞いに苛立つオルガであったが、彼の不器用な優しさにふれ、次第に二人は心を通わせていく。王が犯した罪、オルガの秘密、王の異母弟マグレブの誓い。残酷な運命が三人を翻弄する。 そして時は流れ、正気を失った王妃のもとに双子の男児が生まれる。その名はアーダルテとアードルテ。