Synopsis: As the world decayed into chaos, the Metropolitan Police had no choice but to fight back and create and elite police unit known as Kerberos...the Watchdogs of Hell. Over time, the zeal of the police force soon transformed into actions of cruelty and corruption. However, three of the elite rebelled against the system, but only detective Koichi Todome escaped. Several years later, he has now returned home. But why? What is left for him in this city that continues to decay? Kouichi must now determine who is friend and who is foe as he attempts to unravel what happened after he left.