When a young man dies in a horrendous hay baler accident, Booth, Brennan and Aubrey slap on trashy disguises and go undercover at a rowdy demolition derby competition to investigate the case. Meanwhile, Dr. Gordon Wyatt returns and assists Hodgins and Cam when the ongoing Gormogon case hits a dead end.

In the series' penultimate episode, each leading character's final story begins to unfold. Brennan testifies for Zach in trial, Angela reveals some big news, while Aubrey and Jessica come to terms about their future together. All the while, the team discovers Kovac has escaped, leaving Booth in a race against the clock to protect himself and those closest to him from what may be Kovac's most dangerous plan yet.