A barrister is tasked with prosecuting a former police officer accused of vehicular manslaughter, a case complicated by the victim's mother's insistence on foul play and the defendant's own vigilante past. Kavanagh is drawn into prosecuting Ray West, a former law enforcement officer now operating as a vigilante, who was driving the car that critically injured young Ryan Javis. While Kavanagh doubts his ability to secure a conviction, the fervent belief of Ryan's mother, Jackie, that the incident was no accident, persuades him to take on the challenging case. The narrative unfolds within the confines of the legal system, where Kavanagh must navigate the complexities of evidence, witness testimony, and the moral ambiguities of justice, all while facing the formidable opposition of a former colleague and the emotional weight of the victim's family's plea.

This episode of Kavanagh Q.C. is characterized by its focus on a morally complex legal case, typical of the series' established format. The narrative centers on Kavanagh's internal conflict and his dedication to pursuing justice, even when faced with a difficult prosecution. The performances, particularly John Thaw's portrayal of the titular barrister, are noted for their depth and gravitas. The episode likely appeals to viewers who appreciate character-driven legal dramas that explore the nuances of the justice system and the personal toll it can take on those involved.