Willem gets the shock of a lifetime when he hears that Theo has been shot down in his own apartment. William rushes to hospital, where the question arises: Why did Theo have to die?

After a bloody shoot-out, Theo and Willem venture into Amsterdam's night life. There, a cold-blooded hitman awaits, who can however take them closer to Theo's father.

On his first work day in Amsterdam, Willem and his new partner Sam interrogate a drugged prostitute named Roxy. Meanwhile, Theo and Maartje develop a plan to lure hitman Achmatov out of hiding.

Theo and Willem pursue Theo's father. This leads them to a holiday village, where they encounter a gang of women's traffickers. What's the link between these criminals and Theo's father?

Willem, Theo and Sam join forces to uncover the plans of the Moliers gang. William struggles with family problems in Tilburg and gets a shocking surprise. Meanwhile, Roxy comes forward with important new info about the extortion case.

Theo goes undercover in Guy Moliers' gang and confesses a secret to William. Sam and Willem put everything on the line to put Tessa's abductor behind bars, while Maartje has maneuvered herself into a very tricky situation.

The transport is jeopardized and the Moliers pressure Theo to hand over Roxy. Theo is given a couple of hours. If he fails, the criminal kingpin will kill Maartje. A race against the clock follows, which ends in a bloodbath in the IJmuiden harbor.

With Guy Moliers still at large, Theo hurries to his penthouse to save Maartje. Upon arrival, he seems to be too late and is forced to make a drastic decision. Willem and Sam need to pull out all the stops to save Theo's life.

The liquidation of Guy Moliers is big news. Theo, Willem and Sam conspire with Neelie van Leeuwen to lure the Diplomat from hiding. To do this, they need a dangerous criminal as bait. But is Neelie trustworthy or will she put all of them at risk?

When Willem is falsely accused of murder, he is forced to run. With the entire Amsterdam police force on his heels, Willem makes an all-out effort to convince Theo of the truth about his father even if that means putting his life in danger.