Despite Tanika’s warnings to stay away from the case, Judith, Becks and Suzie continue to investigate, and follow a trail of clues left by the murder weapon. This leads them to an eccentric local weapons collector with an alarming secret, but their questioning proves inconclusive. Judith puts herself in danger during a suspicious local break-in and Becks uncovers crucial forensic evidence. Judith spots a pattern in the evidence and, with help from the friendly local magnet fishers, the trio uncover new evidence that leads them to a chilling discovery – they have a serial killer on their hands!