The most feared pirate knight in a galaxy in decline after a long war. Sarah travels across the galaxy in search of Bernstein's sword in order to become the heir to the imperial throne, but the ruling empire, mired in corruption aristocrats prepared cunning traps for her. Together with the silver knight Celia, she falls into the clutches of the twisted twin sisters Ghyslaine, who control the slaver networks. Inhuman and merciless, they subject girls to the most sophisticated sexual torture. What's next for Sarah? Will she be able to stand in the way of the ambitions of the Ghyslain twins, or will she face a terrible end?