When DCI Mark Holland is executed in a drive-by shooting, his colleagues suspect local crime kingpin Charlie Pearce of being behind the murder. In order to investigate, Liam, Garth, and Kelly are sent undercover posing as importers of fake watches-and a possible target for Pearce's protection racket.

When Fiona Waddington's teenage daughter and young son are kidnapped, a ransom is sent to her family's publishing company. As the kidnappers don't want the police involved, Liam and Garth have to pose as kidnap-and-ransom specialists.