In other words, murder.

Detective story author and occasional amateur investigator Christopher Holmes is now happily engaged and considering a new career path writing true crime. But then a dead body is found in the back garden of his previous house. And as if that were not enough, Christopher’s ex turns up out of the blue, suggesting that the body might belong to Christopher's former assistant.

The same old problem is thus hurtling towards the Holmes household. In other words... murder.