In 2356, after the collapse of the AI civilization, humanity is split into three classes: the underclass, the middle class, and New City. Chloe, an undercover agent of the Freedom Alliance, infiltrates Saul Prison as a female inmate to locate her codenamed ally Owl and retrieve a crucial chip.Inside the prison, she wins over various factions with combat prowess and wits, forming a sisterhood. She gets close to the prison leadership through underground fighting tournaments. Finally, during the prison deathmatch, she kills Huna. Working in tandem with Luna, an undercover guard, they blow up the warden’s office and liberate the entire prison.