Slezzy cannot remember his life before he was twelve years old, living in a constant line of mysteries and injustices around him, among a high crime rate that has plagued the city for more than years. One day, he decides to face a government order, before all his superiors, in the meeting room of the NCC (Nucleus of Combat to the Crime), thus confronting them. By and large, he does not lose his miserable job as just a secretary/recruit, thanks to Sanches, a man who thinks he is the best agent in town, who soon interrupts such an event.

Later, these two would form a strong and loyal double. However, along the way, Slezzy discovers a terrible secret: the Demon World, beyond all its mysteries and powers, when he receives the visit of the Sam Brothers. From this, he needs to deal with such revelation in addition to all the challenges of his military future.