A small-town police chief is shot. Although his wound isn't serious, it is inflicted by his sister. It is an inexplicable act and yet, as the chief tells his wife, "people always have a reason and it's what sets things in motion and once things are set in motion, what's going to happen is simply going to happen." As events move toward a crisis, the characters struggle to make sense of how their lives are defined, not only by their own acts and choices, but by the acts and choices of those around them. Some achieve this understanding and some do not, but everything that happens to them is set in motion by that mysterious shot.