The peacefulness of the Midsomer community is shattered by violent crimes, suspects are placed under suspicion, and it is up to a veteran DCI and his young sergeant to calmly and diligently eliminate the innocent and ruthlessly pursue the guilty.

A group of old college friends reunite on a Caribbean scuba diving trip exploring the wreckage of a WWII battleship and find themselves trapped inside the underwater labyrinth of rusted metal surrounded by great white sharks.

As a young woman lies dying in hospital, we journey through her subconscious as she faces one last fight to say goodbye to her loved ones.