A young woman murdered on the Glasgow docks hits the team hard, when Michael's brother is named as the next of kin. Michael is taken off the case while his brother is investigated, and it doesn't look good as the evidence starts to pile up against him. An unexpected discovery means the case takes a frightening twist, and Annika and her team quickly find themselves in grave danger, their lives at risk from the murderer.
Morgan turns 16, and while delighted, Annika is starting to struggle with feelings of her little girl growing up. When Annika finds herself in danger, she realises she needs to make a decision that will hugely effect Morgan's life.