A killer is running loose in Utah, committing seemingly random executions. A murdered family related to the Governor raises alarming prospects, and a crackdown on the underground polygamist population ensues. Homeland Security enters the fray to assess the threat. Blood Atonement? Terrorism? Fundamentalist Revenge? Soon the true scope of the murders becomes painfully clear: someone is methodically killing the descendent families of the perpetrators of the Mountain Meadows Massacre.