After even Willem casts doubt on Theo's theory about the diplomat, Theo decides to undergo therapy at a monastery. Tjebbo and Willem, each in their own unique way, set out to track down the second convoy of terrorists. Meanwhile, it turns out that the monastery isn't the best place for Theo to find peace after all.

Not only are Theo Kamp and Willem Niessen on the hunt for the Diplomat, who hails from Germany, but together with the Tilburg agency, they also have to save the EU and fight terrorism. It's chaos on the day of the attack. Theo and Willem have to pull out all the stops to get the situation under control.