In the wake of the deadly siege at Waco, FBI negotiator Gary Noesner contends with finger pointing, and his own guilt. With national tensions flying high, the surviving Branch Davidians arrive in court where their trial is set to begin. A flashback reveals the moment that a young Vernon Howell arrives at Mount Carmel, before he would become the infamous David Koresh.

Courtroom testimony grows heated as both sides argue over who shot first. Gary and Angie discover some intriguing information during a stakeout at an Aryan Nation flophouse. Vernon and Lois return from their pilgrimage, and Vernon shares his vision. Gary pleads with FBI brass to take the domestic terror threat seriously.

Gary finds himself under a ticking clock, hoping to prevent another disaster. The fate of the Branch Davidians is revealed as the trial concludes. Vernon returns to Mount Carmel, now the self-appointed prophet, David Koresh. Series finale.