Aya and Hazel are two associates who have a private security business called 9mm Girls, providing bodyguard and surveillance services and being damn good at it. But one day, strong Demons attack their current client which turns out to be way more than they can chew. Getting suddenly involved in some shady and paranormal corporate business, it now becomes an "Adapt or get killed" situation that they'll need to manage. Will they become demon hunters? Or befriend them? Maybe a bit of both...