Explores the history of forensic science, drawing on interviews with top professionals, cutting-edge research, and the author's firsthand experience at crime scenes with forensic scientists.

While Tony and Carol investigate a serial murderer luring single women from weddings, Paula McIntyre and her partner Elinor work to find a blackmailer targeting their ward.

Ten years later Allie Burns is running the northern news operation of The Sunday Globe where she covers the memorial service of Pan Am Flight 103 and stumbles upon a shocking story about HIV/AIDS.

Journalist Allie Burns teams up with another aspiring investigative journalist, Danny Sullivan, for a series of stories in 1979 Glasgow about international tax fraud and a domestic terrorist group that create enemies and get one of them killed.