A bank robbery keeps Wolfs and Eva busy. The perpetrators have taken the bank director's mistress hostage and forced him to open the vault containing millions of euros intended for the Tefaf art fair. The robbers manage to escape cleverly. Wolfs and Eva conclude that they must have had a lot of inside information and investigate the social circle of the bank director and his mistress. They quickly find the perpetrators. But where have the millions gone? Eva also appears to have a strange money problem, which puts Frank's death in a completely different light. Marion argues with Romeo about her investigation into his girlfriend's bowling alley. And the anonymous threats against her continue.

Eva falls into the hands of Frank's killers. Wolfs discovers that Luca is abusing his daughter to blackmail Eva. Marion is also missing, but no one except Romeo has time to look for her. He discovers that she is being held hostage by the person who has been threatening her all along, and who now intends to carry out his threats. Luca turns out to be playing a double game in order to get his hands on some of Frank's money.