A wealthy shipping magnate is found dead at a Christmas party. Things get stranger when a man in London receives a mysterious Christmas card connected to the victim's death.
The arrival of a long-lost brother to a family-run golf club culminates in a body on the course. But a prime suspect with an alibi leaves the team with an impenetrable conundrum.
Having been assigned undercover, Florence unexpectedly arrives on Saint Marie point as a child minder for Miranda Priestley, but it's not long before she caught up in a murder.
A reggae rap artist is shot dead at a soundcheck for a concert. Things prove uncomfortable for Marlon when he discovers a personal connection to the crime.
When a prestigious chess match ends in murder, the team must work out how and why the killing was carried out. Meanwhile, the commissioner is confronted with his past by the very last person he was expecting to see.