The body of 20 year-old Lorna Katz is discovered drifting near the bottom of the River Lea. Her hands are bound, suggesting she was tied up somewhere before she floated downriver.
When Nikki, Jack and Thomas make a horrific discovery in the van, they are confronted with the work of a killer who preys on illegal immigrants. With the help of Clarissa, they must work out where the killer will strike next before more vulnerable people meet the same fate.
When a people smuggler is found dead in the City, Nikki must delve into London’s illegal immigrant community. She meets a vulnerable Syrian teen called Akka who is in need of help, putting Nikki in a moral dilemma – and the killer is still on the loose.