The death of a scientist on the side of a live volcano proves a difficult case to crack for Humphrey and his team when everything appears to point to a death from natural causes.

Florence finds herself emotionally involved in a case when a former schoolmate, Esther Monroe, is found dead at the foot of a cliff during a literary festival. The prime suspects for the murder include Sylvie Baptiste, writer of the infamous local novel "The Flame Tree"; her assistant, Patricia Lawrence; and festival organisers Anna and Oliver Wolf. Whilst searching for possible witnesses to the murder, Dwayne and JP come across a frightened woman living in a wooden shack on the outskirts of Sylvie Baptiste's estate. When Florence discovers that the woman may infact be Sylvie's long-lost sister Lizzie, a possible motive for Esther's murder comes to light.

Humphrey and Martha's romantic weekend at the remote Hotel Cecile is disrupted by the murder of the hotel owner on the first night of their stay.

The president of the Saint Marie cricket club is found shot dead in the middle of the team's ground. As the sun rises over the island, suspicion falls on his teammates.

A murder investigation propels the team to London in pursuit of their suspects.

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.

When a tourist claims to alibi a woman convicted for murder seven years ago, the team are forced to reopen the case.

Saint Marie's mayoral elections are thrown into disarray when one of the candidates is stabbed in his polling booth whilst casting his vote.