Commissioners Neuhaus and Gillot are supposed to investigate two deaths. A man suddenly dies at home and a young man dies from his crossbow. Foreign influence? This death is very close to the detectives' minds.

On the run with a hammer: Inspector Jung and her boss Enders pursue a perpetrator in Mainz's old town. Back at the station things get difficult: a rioting prisoner screams like he's out of his mind.

Funny costumes and lots of alcohol. The Old Town Guard has a lot to do during Carnival in Mainz. Does the llama go for walks with his own garbage can or is it stolen? Police Commissioner Jung investigates the matter.

Inspectors Udo Hotz and Omar Meftah from the Heidesheim motorway station have just confiscated a driver's license when they are called to an exciting chase.

Brawl in front of a club: Commissioner Katharina Klüpfel and Michael Kirch are called to a club. They resolve the argument among several drunk and aggressive men, but suddenly the mood changes...

A lot to do that night: The search for a stalker is underway, a young drug victim is being examined and a confused man is crouching aimlessly under a lamppost while a car rushes into the tram tracks.