Stan's girlfriend Saskia disappears. Stan knows she was being threatened, but he doesn't know exactly by whom. Could her former boyfriend Frits Nekke be involved? There's no time to find out, because the city of Rotterdam is being terrorized by a sniper who must be tracked down at all costs. Is it someone who harbors a grudge against the municipality, or is it a confused person living in his own reality? Only when the team unravels the shooter's modus operandi can they set a trap. Hein Berg arranges a meeting with the young infiltrator Charlie in a special way.

Detectives are confronted with the director of a charity who has died in an accident. It quickly becomes clear that the director was murdered and that his lifestyle was less respectable than he claimed. A thorough investigation reveals that the director was not particularly careful with finances. Hein Berg focuses on Frits Nekke's criminal twin brother.