Naoto and his crew continue their deep descent into the dark world of Shangri-La, where crime, betrayal, and peril run rampant. The two geniuses, Naoto and Marie, attract evil forces in the hellish underbelly of society, and their fates slowly become locked together like rusted cogs. Shangri-La runs on death, and its strongest leader wants Halter to execute a tricky tradeoff, but will the decision Halter makes be the right one...? And when an unfamiliar face from the Initial-Y series appears, RyuZU might be in trouble!