-I KNEW NOTHING BEFORE TODAY.-
With the help of the enigmatic Rat, Shion becomes a fugitive, escaping No. 6 and getting his first glimpse of the desperation and violence that are facts of life outside the city wall. And as Shion learns more about the secret that forced him into exile, his loyalty to the people he left behind and Rat's thirst for revenge threaten to tear the pair apart

-OUR CHANCES OF SURVIVAL ARE ROUGHLY ZERO PERCENT.-
Shion accidentally learning that his childhood friend Safu is under arrest - and all because of him Not wanting to get Rat involved, Shion sets out alone to save her. But how can he possibly infiltrate No. 6's secure correctional facility and escape with a high-priority prisoner all on his own?