After two fatal cases are reported, Lindo, Bart and the team investigate and soon find themselves immersed in Aberdeen's shipping industry and drug underworld.

When breakthroughs are made in both cases, the stakes are raised further and loyalties are put to the test, with brutal consequences for both police and criminals alike.

As both cases reach a stunning conclusion, Lindo and Bart face a race against time to save innocent lives, whilst the depth of various betrayals are finally revealed.