In the west of the Arcadia continent, the Karvas territory is nestled beneath endless wilderness and cliffs.

Grand Duke Erzen de Bern of Karvas. Everything collapsed for him after he lost his partner Guest eight years ago.

Since that day, the Grand Duke has gradually changed.

He stopped appearing before people, and the castle gates were firmly closed.

Executions increased without reason, and lives were often lost due to minor mistakes.

Karvas became a place where one had to be careful even to breathe, and people whispered that he was the 'Mad Grand Duke.'

No one knows, but he still cannot forget the deceased Guest.

Every night, he chases the phantom of Guest, living trapped in memories, unable to distinguish between reality and the past.

And one day, a slave is sold to the Karvas territory.

A mere existence whose name and background do not matter.

But the moment Erzen sees the slave, he feels a strange sense of dissonance.

A familiar gaze, a way of speaking that remains in his memory, even the smallest actions.

Traces of the one he thought was dead begin to appear as if they are alive before his eyes.

『All the cracks in the Karvas territory begin to move again with the appearance of that slave.』