SPOILER ALERT
DI Nick Dixon is on suspension, working cold cases, as his disciplinary hearing looms. He did not disclose that he was directly involved in his last case. He will be given a slap and put on the next big case that has come in the middle of massive flooding.
The wife, Elizabeth, of a candidate for MP, a by-election, Tom Perry, has been brutally murdered; she was pregnant. Nick, DC Jane Winter (Nick's girlfriend) and DC Louise Willmott will determine that there were more than one vehicle heard on the night, one being a motorcycle. The witness' late husband was a motorcycle enthusiast and owned a British Norton Commando, so she is sure that is what it was. Scouring the CCTV they find and follow a cyclist. They also research all the cycle owners. When they find the man and his house, he shoots his girlfriend, and they ends his life by confronting the police. He had hired a couple of men to kill Anne, then he had gone in to place evidence that would direct the killing. It appears that the Albanians are again involved. Zavan, indeed, finds and faces Nick on the beach, giving him clues, look for the insurance.
Oddly, Elizabeth Perry also suffered from Type 1 Diabetes, as does Nick. It is an aha for Nick, once he seems stumped, that this could be a factor. Anne was intolerant of human insulin, which made her very ill, and once switched to animal Insulin she quickly got better. They had gone to the NHS regarding the issue, and once he was elected, Tom intended to push on the issue of informing all diabetics that they had a choice pf which insulin to take. The human insulin was more expensive to produce...by a single company, Betalin...but was the insulin that was consistently prescribed. The owner/director of Betalin, Dr Ann McConnell, sees profit and bonuses fly out the window if this happens. Not only would the company lose the sales of the human insulin they would have to spend millions changing their manufacturing equipment to produce animal insulin. The stakes are millions. It is determined that there is someone elso involved, her paramour of years, Barry Dossett, Tom's area campaign manager. For 30,000 pounds thay hired the killing of Elizabeth, believing that Tom would drop the issue.