Andrew Tollson, age twelve, runs away from his New Jersey home when his mother finds out he has been skipping school. Deep in the forest Andrew stumbles upon an ancient revolver, loaded with six rounds. Deeper in the forest he finds a door that takes him to another world entirely—a world in which guns don’t exist. Paired up with an imaginative farm boy, Andrew encounters danger and dark magic in his adventures as a legendary gunfighter. However, he has a limit—he only has six bullets to spend, and his enemies are bent on closing the door that Andrew hopes will lead him back to his world.