A RASH OF MURDERS
A young woman pours acid over her body. A loving husband kills his wife. A headteacher throws her pupils out of a window. Who or what has made ordinary Londoners commit such horrific acts?

A DEADLY VIRUS
DC Jerry Pardoe and DS Jamila Patel of Tooting police are at a loss. With no obvious connection between the killings, they fear a virus.

THE INFECTION IS SPREADING
Something evil is stirring in the city. A supernatural force that infects its victims with a lust to murder. And Jerry and Jamila are powerless to stop it…

Narrated by Mark Meadows