Trevor Wright is a young and seemingly ordinary janitor who secretly moonlights as a badass monster hunter working for a top-secret organization, "The Maitenance Division", dedicated to protecting the human world from inhuman threats. The hunters are comprised of various other janitors, electricians, plumbers, mechanics, etc. Armed with proficient skills at hand-to-hand combat and various weapons and gadgets, Trevor goes through his life with everyone believing he's a nobody who cleans up after people, despite working in the shadows to fight against incomprehensible beasts and creatures that prey upon humanity. Eventually, Trevor is then invited to a 10-year high school reunion, figuring he needs a break from his monster-hunting duties, he reluctantly decides to attend, haunted by the memories of being a shy, bullied outcast during his teen years, and many of his old classmates, including both his old crush and his former bully, have gone on to live successful lives, making him feel inadequate about his cover as a normal janitor. Until his work life begins to invade his personal life, during the reunion, a vengeful cult of monster-worshippers, The Obsedien Choir, whom Trevor had a brief previous encounter with, crashes the party, propelling him into action and revealing his true self to all his former classmates. As the dark forces are closing in, Trevor gears up and calls for backup from others in the Division, including his retired mentor, to combat the Obsedien Choir.
