Storylined by Val McDermid, written by Martin O'Brien, Christine Marshall, Barbara Phillips, Jonathan Larkin, Charlotte Allan and Paul Butler.
A tense thriller recorded on location in the famous Williamson tunnels under Liverpool.
Morgan McCarthy is missing; so is a priceless map of the Williamson tunnels.
Why has she taken it? Who is after her? Why do they want the map so badly?
Jerry/Anthony....Samuel James Hudson
Radio reporter/Passenger 1/Slave....Danielle Henry