At the Special Service Bureau, deep divers are combat elites who stand out from the rank-and-file through a rigorous selection process and harsh training, after having passed numerous tests.
They are always dispatched to the most dangerous places, facing extremely difficult challenges that are beyond human reason, even verging on the incomprehensible. They know how to survive in the lethal environments of alien planets, how to chase down insane followers of the Angel Sect in lawless zones, and even how to penetrate the Exotic Realm to confront the most dangerous entities or delve into nightmares, rescuing ensnared souls woven into the complex labyrinth of spirit and consciousness—submerging from the peaceful calm of the present world, down into the dark dimensions beneath sanity, this is their job.
But in this world, there are always things beyond human comprehension and resistance, even for the most elite deep divers, and failures are common.
