The body of the young cleaning lady Camille Bartell is found under the tree top path within the Saar loop. Criminal Commissioner Judith Mohn and her colleague Freddy Breyer quickly suspect their husband Eric Bartell, who seems to be hiding something. In the course of the investigation, there is an unexpected rapprochement between Judith and her mother Karen Mohn, who knew Camille about cleaning. Karen cannot help Judith, but surprises her estranged daughter with unfamiliar energy and zest for life. She recently met and loved a man – on the Internet. Judith and Freddy fall that Camille only cleaned for single women.
And they are all dead unhappy because their new internet love no longer answers them: a Belgian to whom they have given a lot of money and trust, to start a new life with him. Does this unscrupulous love scammer have anything to do with the murder of Camille? Judith and Freddy have to recognize that there is now only one active connection to the suspect they are looking for: Karen. Does the trail of Judith's mother's supposed new love lead investigators to perpetrators?