The team investigate the death of a Burmese man on a deserted beach, whose young pregnant wife desperately hopes is still alive. Nikki and Jack piece together the perplexing crime scene and find it poses more questions than it answers.

The Lyell are called to King's Cross Station Museum, where they discover the bodies of eight victims entombed below. With the knowledge that a prolific serial killer was operating in London nearly 20 years ago, Nikki and the team know this will be a case like no other.