A minivan explodes at a car park, killing a woman. After piecing together her remains, Booth and the team realize that she is a known fugitive to the FBI for nearly thirty years. It turns out that the woman had been a member of the National Liberation Army, a leftist radical group who were presumed responsible for several crimes, in the 1970s. The case is reopened as Booth finds himself in an awkward position when his former mentor, who was the agent in charge of the case, and prosecuting attorney Caroline Julian clash. Meanwhile, Brennan visits her father, who is in prison after being arrested by Booth.