Architect Casimir 'Cas' De Brouwer is in hospital, claiming he was there but didn't see who killed his wife with the fireplace poker. Roos soon discovers the housekeeper was lying to, but she suffers the same fatal fate. The team unearths a crucial secret Cas shared with his university study mates, contractor Bo Beirnarts and their lawyer Alex Wildiers, who actually are linked by more crimes. Then Marijke is kidnapped.
—KGF Vissers