Sarah Sears is haunted by an abusive husband, a sexual encounter with a sociopath, and an unreachable daughter spiraling out of control. Her unlikely job as a deputy sheriff in a small Texas town puts her on a collision course with criminals whose unspeakable deeds transform this mother into a religious vigilante. With God as her partner, she uncovers the dark sins hiding within a small community and takes vengeance on pious hypocrites and sons of the devil. Under the guise of solving crimes, she cleanses the earth of wrongdoers. But when she encounters Henry Lee, an unusually skilled serial killer, the stakes are raised higher than ever. Sarah will either rid the earth of Satan's worst wrongdoer or shatter her family forever.