Gently is surprised after he receives Bacchus’s resignation, and he soon works out that he has lost his confidence. Attempting to help Bacchus, Gently insists that he needs him to help investigate a death in custody.

Gently and Bacchus make their way to a family holiday camp to investigate both the staff and holidaymakers after a body of one of the greencoats is discovered nearby. Gently and Bacchus soon discover a story of jealousy, ambition and the dark side of a permissive society.

When two deaths connect in an unexpected way, Gently finds himself drawn into the world of drugs and LSD, and considering a Cold-War conspiracy. In the process of his investigation Gently relies on the help of an old friend – and as they begin to dig into the case, old feelings begin to stir for Gently.