Brilliant Cat, a princess from a small island nation, leads a double life as a vigilante thief by night, fighting for justice. Her real name is Asuka Nekomiya, who hides her identity as a journalist for a publishing company. She exposes corruption and delivers stolen goods to the poor, stretching the hand of justice from the shadows. However, she falls into a trap set by a shadowy broker and is captured for auction. Amid fierce bidding, she is won by Kurosawa Shusuke, the boss of Inferno, who holds a grudge against her for stealing from him in the past. Kurosawa intends to break her spirit and reprogram her to submit completely to his control. The story unfolds as she faces terror and inner conflict, torn between her sense of justice and the encroaching darkness.