On her first day in the new role, Annika and the team are called in to solve the murder of a man found in the Clyde, a harpoon piercing his…

The MHU are sent to Edinburgh to investigate the death of a recently released prisoner whose body is pulled out of the Forth River, imprisoned in a dog cage.

Annika reflects on Jekyll and Hyde as she and the team investigate a millionaire found dead in his own shark tank.

When a phone with a brutal drowning recorded on it is handed in to MHU headquarters, the pressure is on for Annika and the team to track down the murderer.