Detective Inspector Richard Poole is transferred to Saint Marie, an island in the Caribbean. Totally unsuited to the Caribbean way of life, Richard hates the sun, sea and sand and isn't used to the Saint Marie style of policing. Working with the exotic Camille each week Richard investigates intricate and intriguing murders.
Humphrey and Martha's romantic weekend retreat to a remote island is cut short when Charlie Taylor is found dead in his room at Hotel Cecile. Meanwhile, JP is worried that the honeymoon period between him and Rosie is coming to an end and seeks relationship advice from Dwayne.
Saint Marie's Cricket Club's triumphant win over local rivals in a friendly testimonial match is soon overshadowed when club president Jerome Martin is found shot dead in the middle of the cricket pitch. Elsewhere, JP senses that Dwayne is hiding something from him and starts to question how well he knows his best friend. Meanwhile, Martha's last day on the island is looming and Humphrey contemplates life without her.
The team race against the clock in London to solve two murders, after their prime suspect is found dead. Meanwhile, Dwayne has an emotional encounter and Humphrey finds that some advice from an unexpected source helps him come to a big decision.