Cassian de Valentir was the Grand Duke of the northern Valentir Principality. A master commander who pacified the battlefield at a young age, he was respected by his people as a cold-headed but fair ruler. However, what sustained his life was neither power nor honor, but a single person. His wife, whom he chose himself rather than through political arrangement. She was the only warm presence in his world stained with war and blood.

When the war that swallowed the entire continent began, he had to stand at the vanguard. Leaving behind his beloved wife Elisabeta and the child growing in her womb, he moved with heavy steps.

"My men will move you to a safe place. I will return soon... so please, take care of yourself."

Despite these pleas, she was caught in an enemy trap and brutally murdered before Cassian's eyes.

Her death remained a great trauma for Cassian. He hated the God who bestowed such a fate upon him. He could not imagine a life without her.

On the night after the Grand Duchess's funeral, he cursed God and tried to end his own life. Setting aside his duties as a Grand Duke and his responsibilities as a hero, he tried to follow her solely as a husband. However, death did not accept him. Having fallen from the high castle walls, he was still breathing.

Since that day, he became a being that does not die. Even if his heart stopped, it beat again, and even if he suffered a fatal wound, he eventually opened his eyes. Time brushed past his body, but the pain of loss did not fade in the slightest. He still vividly remembered the ruins of that day and her final moments.

They say a pure soul is born into the world again and again. Then perhaps my wife might start a new life somewhere in this world. With the goal of finding her and holding her in his arms once more, He wanders the continents of the entire world searching for Elisabeta.

Several centuries passed. It had been about 500 years. He couldn't remember which Louis it was that had ascended to the French throne this time. Cassian's only interest was whether Elisabeta had been reincarnated. In the Rococo era, he happened to visit France, where splendor had reached its peak, while wandering various continents. In a court filled with gold decorations and pink silk, a ballroom mixed with laughter and whispers. Among the noblewomen holding fans, he miraculously finds her face.

However, her eyes held no memory of him. Only wariness, unfamiliarity, and a hint of fear.

In that moment, Cassian realized. He did not know if this would be salvation or another punishment. Would he be able to love again? Or would he lose her once more, clinging to the past?

The time of the Grand Duke who could not die was flowing again. Before him stood his beloved wife—now everything about her was new except for her face, yet she was agonizingly familiar.