The film stars Kathy Baker and Amy Brenneman as ATF agents who work to infiltrate an armed militia, a group which the film describes as akin to the Branch Davidians, a religious group held off ATF agents and were later set siege to by the FBI in Waco, Texas in the Waco Siege of 1993.

Following the infamous tragedy in Waco, Texas, in which the Bureau of Alcohol, Tobacco and Firearms (A.T.F.)

found themselves in a battle with an armed militia, the organization, led by director Maggie Hale (Kathy Baker), finds itself in a new fight.

Agent Robyn O'Brien (Amy Brenneman) goes undercover to infiltrate a militia selling illegal street-sweeper guns, dismissing Hale's orders to stay away.

is left with the decision to start another Waco and attack the militia, or come up with another way to save her.