On one side, we have a kidnapped rabbit beast-kin girl whose village was razed to the ground so she could be captured and sold into slavery, her identity and background magically erased in the process. On the other, we have an unnamed victim of an isekai, by means unknown, who is not only dragged to the new world, but has his soul shoved into a dungeon core, his identity and background also magically erased. They meet in the slave-pens, which are a stable, at a slave-operated mine. The two then have to work together to try and regain their agency, and their freedom.  With the human supremacist kingdom of Sydonia arrayed against them, can they succeed?