While working in a busy NHS hospital, nurse Tracy Pickford gets a better job in a private fertility clinic. The Jenner Clinic is out in the country, very quiet and far away from the bustle of the city. All seems normal, but for the off-limits section where they keep test animals, and the nightshift Tracy is assigned to would be boring except for mysterious activities centring on those out of bounds laboratories.

Peter Carson's subversive investigation uncovers Dr Jenner's dark past, including details of the probably illegal, certainly unethical genetic engineering experiment, he initiated a decade ago.

"It's not over yet," vows Carson. But later, in a post office sorting room, we see Hennessey confiscate copies of an incriminating video that had been mailed to the press.