From Newsgroup: rec.arts.mystery

'An American private detective, named Johnson? is shot dead in Bonn and the murderer' named 'Charlie Umlaut is' able to be 'arrested.-a The German authorities suspect a connection with drug trafficking and put-acustoms investigator-aKressin-aon the case.'-a A man named Sandy, Johnson's 'partner, travels from the USA and tells Kressin about the case they are investigating: An American presidential candidate is blackmailed with a photo that shows him with a stranger.
When Umlaut' is able to 'escape and Kressin is injured to the point of hospitalization during his pursuit, Sandy carries out the investigation.-a In Cologne, he shadows Christa, the woman depicted in the photo.' He drugs 'her with a pill that he puts in her coffee, and lets himself be photographed with her.-a He then,-amounts-athe head of an Italian politician in the-aphotos.-a He explains to her that he wants to get into the blackmail business.
Christa reports' 'Sandy to Mensur, who heads an international blackmailer ring from Bonn.-a He has the detective kidnapped and brought to work in his organization.-a Together with Christa he is assigned to an African politician named Luthini, whom they' incapacitate 'at a conference at Petersberg mountain-aand they photograph him with Christa in a compromising way.
Then,-a Sandy and Christa meet for a romantic picnic nearby at-aDragon's Rock (Drachenfels),-a but they are surprised and threatened by Mr. Umlaut who seems to be suffering from drugs or madness.-a They receive the next order from Mensur, which concerns a Chinese diplomat in-aEssen.-a Here, they argue for the first time because Christa' questions Sandy's behavior' as 'too rough, which she also complains about at Mensur.-a One also learns that Umlaut is falling out of favor with Mensur because of his drug problems.
The two 'are later assigned to a European politician whom they follow on a ship' along 'the Rhine.'-a The politician 'does not show himself to be blackmailed, but even pleased about the incriminating images, because he would like an image as a bon vivant.'-a 'Christa shows great doubts about her activities and' even 'her life.-a She confesses her love to Sandy, whereupon he explains his investigation.-a Together they plan to outsmart Mensur and secure the' negatives 'of the recordings' involving 'the US politician.'
In their 'last assignment, Christa approaches a minister in Cologne.-a When she meets with Sandy in the middle of a carnival procession, they are discovered and attacked by Umlaut' and 'Sandy kills him in an unarmed fight.-a The two go back to Bonn.-a In a back room of the university fencing room, Sandy meets Mensur, who exposes him as a detective and challenges him to a fencing duel.-a Sandy is far inferior to the professional, but' 'defends himself with' an 'entire collection of medieval weapons hanging on the walls and can finally kill Mensur with a battle ax, but is also injured himself.-a He takes the film negative with him.
But then Christa appears, threatens him with a pistol and wants the negative for herself.-a Sandy flees, is caught up with and shot by her' on 'the same street where his American partner was' 'killed' before.-a 'Christa believes she has killed him and weeps over the loss, but Sandy is still alive and' he 'shoots her.'-a He now 'mourns her betrayal and death.'
SOURCE: (updated)
from Wikipedia Germany, Wikipedia the free encyclopedia
-- https://de.zxc.wiki/wiki/Tatort_(Fernsehreihe)#Liste_der_Tatort-Folgen
(see: 'Main article : List of crime scene episodes')
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