Four teenage girls suddenly go missing without a trace in various locations based in the North and the East of England in a short period of several months apart. One of these girls, Gracie Peterson, is found alive in a small wooden box on an abandoned industrial estate, with injuries that are so gruesome even the paramedics cringe in anticipation whilst trying to free her, after Gracie had spent eight horrific weeks in captivity. Detective Inspector Marty Bride and his specialist team of detectives, forensic investigators and psychological profiles become chilling aware that there is a brutal serial killer on the loose who enjoys leaving them various clues to his real identity.