Staring down the barrel of a crumbling career and imploding marriage, "math hobbyist" Roger Prumont, unwittingly creates a formula that might predict when and where the next mass shooting occurs. He hits the road (where he's joined by his unimpressed daughter) to test whether the Method could actually save lives. Except what if mass shootings are so ubiquitous now that his predictions are merely dumb luck? And what if he's risking his own life to find out?