Susan Keller is released to howls of protest after serving a life sentence for the murder of an entire family when she was just a teenager. Forced into hiding she accepts an offer of a country retreat. Fearing that it may be a trap the Taggart team are assigned as protection. When members of Kellars are murdered one by one it is clear that someone is taking revenge. The team begin the hunt for the killer - is it Kellers annonymous benefactor or someone closer to home?