The Vigilante universe encompasses a vast multiverse. These universes consist of numerous pocket universes called “Sacred Domains.” The series is written from the perspective of multiple characters. The chapter is told from the perspective of whichever character's name appears at the beginning of the chapter. Akihiro Atlas, brought to the Sacred Domain called Cistern long after his birth, is the main character of the series. He is someone with multiple reasons to become humanity's hero. He has dedicated his life to Cistern, his new home, and wants to protect everyone he meets based on the relationships he has developed there. He began his life in Cistern as a member of the Team and continues it at the beginning of the Vigilante series, having reached the level of General of Team 2. At the beginning of the series, Akihiro is sent to the real world for a mission lasting three years. For this reason, he is not in Cistern. The first chapters of the story are told from the perspective of other characters prominent in the series, Kuren Y and Kazami. The universe has a very large hierarchical system. At the top layers, there are dozens of beings such as the Supreme God, Outer Gods, Gods, Supreme Kings/Queens, Kings/Queens, and it encompasses many different races. It tells the story of Akihiro's journey and the suffering he experiences in this incredibly vast universe.