The Taggart team are responsible for protecting witnesses involved in a "cab war" trial. It seems there may be a hidden agenda when the prosecuting barrister is found murdered.

Julia Fraser, wife of a police sergeant, is brutally murdered whilst he is on duty. During a search of the house a list of names is found. It appears that the names on the list are rapidly meeting with a series of accidents - and yet the only connection between them is the list.

The murder of his father sets young Simon Barrow on a nightmare journey, and his dying words on Simon's answer-phone throw the police on a trail of confusion.