Taggart investigates a failed rape attempt by a masked attacker. However, his job is complicated when the victim commits suicide and the criminal strikes again, and his attacks soon turn to murder.
Patrick, a college student, and his married lover Kim plan to murder her husband and make it look like the Glasgow Bowman had done it. Meanwhile, a psychic tries to convince Taggart to let her help.
After Patrick bungles the killing and runs away, a horrified Kim has to finish the job herself. Suspicion falls on Patrick's best friend Alan, a crossbow enthusiast, when Patrick drops his keys at the crime scene.
While a hapless dentist keeps trying to kill his invalid wife, Taggart and his new partner, Mike Jardine, investigate the murder of a satanist private eye found burned in a tunnel on the day of the equinox.
Taggart's former sergeant turned private detective, Kenny Forfar, begins poking his nose into the investigation. Mike Jardine goes undercover at a hippy commune.
Just as Taggart begins closing in on the murderous dentist, he receives a phone call from the dead private eye. Did the pathologist misidentify the body or is there black magic at play?
When a woman shoots her husband after discovering that he was having an affair, it appears to be a clear-cut case - until the police realise the man was already dead when he was shot.
