The 22-year-old student Doro Meisner was strangled in the parking lot in front of a Dresden club. Inspectors Henni Sieland and Karin Gorniak determine that it is apparently an act of revenge by the "Vogeljäger", a group of men who were all cheated by Doro alias "Birdy" on an online dating portal with false promises of love. They goaded each other on a forum to hunt down "Birdy" in order to get revenge on her. However, the investigations show that Doro had long since logged out of the portal. The operator of "Love Tender" used her photos for a false profile and financially robbed his customers. No usable traces were found at the scene of the crime, but after intensive questioning, Sieland and Gorniak were able to narrow their search down to two murder suspects.
One of them is Petrick Wenzel, who cares for his terminally ill mother and hopes for love. The second suspect is the young entrepreneur Andreas Koch. He was also near the crime scene on the night of the murder. A witness who witnessed the murder over the phone is in mortal danger. In order to speed up the investigation, Karin Gorniak and Henni Sieland decide to go undercover against the will of their chief Schnabel. In search of the murderer, the detectives delve into the world of online dating, in which potential perpetrators and victims are looking for great love. At first, the investigators had no idea that their situation would soon escalate.