Alec is rescued from the water and has an unexpected visitor in hospital… Meanwhile, in Dusseldorf, Linda has a breakthrough and she starts to believe that Ruben Locana's death wasn't an accident. And it's a race against time as Bobby, Nina, and Alec try to locate the mystery pages at the heart of the case.

With the Ghost Detective's identity revealed, Alec and Nina find themselves trading favours for information, which soon has deadly repercussions… Meanwhile, Bobby and Linda come up against a cunning adversary in Dusseldorf. And a surprise ambush in a hospital leads to a breakthrough in the case but lives hang in the balance.