The world that King's Marshals is set in is unique in the way it combines a multitude of supernatural species living alongside and happily within the world of humans without giving away their true nature. The stories revolve around a group/squad of US Marshals, the individuals within it, and their leader Addison King. Their mission is simple, they uphold the human laws in the world of the supernatural, assuring that humanity is safe. They take on cases that human officers would never be able to solve and criminals that due to their supernatural abilities would never be caught by any in the human world. They also resolve to help those in the supernatural community that need assistance and can't get it from conventional means.