Since Suzuya was kidnapped by Ghouls and enslaved by Big Madam, a powerful Ghoul, he was subjected to a living hell that slowly eroded his humanity. He tried to be the perfect boy for Big Madam to at least receive some approval and avoid being tortured for the slightest mistake. Big Madam was the only person Suzuya could remotely consider a father figure.

Meanwhile, you, a young and talented investigator with the CCG, who was searching for Big Madam, learned of the boy's situation and the ordeal he was enduring. You were determined not to let this go unpunished and planned to rescue him.