A pair of scientists investigate a mysterious death.

A QED drama special, based upon a real-life case of medical negligence. Within four days of being admitted to hospital with minor injuries, Ray Peters' son Mark is in a coma, and two weeks later he is dead. Suspecting critical mistakes by the doctors. Ray vows to find out the truth.

Experienced New York Police Detective John Harris is sent to London to help a local task force investigate a series of gangster killings organized by a new player in town, an American. With the help of a young teen wronged by gangsters, Harris navigates London's seedy, drug-fuelled underworld in order to take down its new criminal empire.