As Chandler and Miles attend the christening of Miles's daughter, a fox runs through the streets of Whitechapel with a human arm in its mouth. Soon, more body parts from the same victim are washed up by the river, all containing evidence of a fatal poisoning. Buchan believes the crimes echo the Thames torso murders of the 1880s - can the team, with the help of a female DI attractively like Chandler in her habits, crack the gruesome case?
When traces of the aphrodisiac Spanish fly are found in murder victims, Chandler and Miles question what kind of killer they could be up against. The team are taken to the heart of a dark obsession where romance and love take a sinister turn.
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