n old friend from Taggart's past gets out of prison and the bodies start piling up. But is there some fishy business going on that muddies the waters for the Taggart Team.

A research scientist is murdered by an unknown assailant but it soon becomes clear that she is another victim of a serial rapist - 'The Mechanic'.

When Dr Janet Napier walks free from court on a "Not Proven" verdict, Taggart begins a more personal investigation. However as more murders are commited Taggart must admit that even he might have been wrong about the good doctors guilt.