In the west of the Arcadia continent, the Carvas territory lies beneath endless wilderness and cliffs.

Erzen de Beln, the Grand Duke of the West in Carvas. His world collapsed eight years ago after losing his partner, Guest.

Since that day, the Grand Duke has gradually changed.

He stopped appearing before the public, and the castle gates were firmly shut.

Executions increased without reason, and lives were frequently lost over minor mistakes.

Carvas became a place where one had to be careful even when breathing, and people whispered about him as 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 his memories, unable to distinguish between reality and the past.

And one day, a slave is sold into the Carvas territory.

A mere existence whose name and background do not matter.

However, 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 small gestures.

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

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