Gold finds herself caught in an awkward situation when Peter Harris' wife Mary turns up at the station with a ransom note – claiming that Peter has been kidnapped. Forced to reveal her night of passion to Manson, suspicion immediately falls on another of Peter's lovers, who arrives the scene of the planned drop to collect the ransom money. However, Manson soon realises that the team have been duped, and it's not long before Gold realises who the kidnapper really is. Meanwhile, a youth is badly assaulted on the Larkmead estate, and with a little help from his flatmate's brother, Hardy and Valentine investigate a local youth club owner who they suspect may be responsible for dealing drugs.
