A New York Times bestseller from the world's bestselling author. Detective Michael Bennett and army-sniper-turned-NYPD-officer Rob Trilling travel to Montana to investigate a case that crosses state borders and family lines.

In New York City, a series of deadly bombs explodes. Across the river, a military base is burglarized for munitions. In Montana, violence and arson rock a small town outside of Bozeman. Are the incidents related?

Bennett, Trilling, and the ATF investigate. A single-minded group angry with the government keep turning up in unexpected places, insisting that they're only trying to make the world a better place. To law enforcement, their claims seem delusional.

Will words or gunpowder light the next fuse?