Ava Fleury (Ella Rumpf) is a student at an elite boarding school in the Lucerne area. She is hit by a truck on a country road at night. The driver fell asleep at the wheel and did not see the young woman in the darkness. The next day, Flückiger (Stefan Gubser) and Ritschard (Delia Mayer) arrest the suspect, Fritz Loosli (Urs Jucker). He admits that he was the driver of the vehicle and that he panicked and left the scene of the accident. At the headquarters he unexpectedly meets the dead girl's father, Laurant Fleury (Luc Feit). He vents all his grief to Loosli in an outburst of anger. One quickly suspects that Fleury does not want his daughter's death to go unpunished. After the autopsy of the corpse, however, one thing is clear: Loosli is not to blame. Ava was already dead when she was hit by his truck.
Someone hit her with a heavy object and placed her on the street. Inspectors Flückiger and Ritschard begin investigating at the boarding school and in Ava's circle of friends. You meet the offspring of the political and economic elite from all over the world. For Flückiger, to whom any use of power against the As the bottom line goes, the investigations are not an easy undertaking - all the more so as the tracks lead to the brother of an emir, who is visiting Lucerne as a minister and enjoys diplomatic immunity. Flückiger increasingly finds himself in a conflict of interest with the Federal Police and risks the investigation becoming a state affair. In addition to Delia Mayer and Stefan Gubser, the tenth Swiss "Tatort" again features Fabienne Hadorn as forensic scientist and Jean-Pierre Cornu as police chief Eugen Mattmann.
The episode roles feature well-known Swiss actors such as Urs Jucker as the truck driver Fritz Loosli, Esther Gemsch as the energetic boarding school director Elisabeth Ammann, Samuel Weiss as the federal police officer who has come under pressure and Luc Feit as Ava's grieving father. In addition, young shooting stars such as Ella Rumpf as Ava and Flurin Giger as Tom complement the ensemble. Nadim Jarrar plays the role of young minister Ali Al-Numi. Markus Welter was won over to direct "Tatort: Kleine Prinzen". The script for "Tatort – Little Princes" was penned by the two authors Lorenz Langenegger and Stefan Brunner.