Four weeks ago, the members of the Oase Ostfildern building community moved into their building and the foundation had to be dredged up again due to a sealing problem. An even bigger problem emerges: an unidentifiable female corpse. Thorsten Lannert and Sebastian Bootz try to find their way between group sessions and the residents' expressions of feelings in order to obtain clues to the identity of the dead. They encounter the idealistic dream of communal living as well as the conflicts that appear between the apartment owners when they realize that one of them may have become the perpetrator. Especially since the dead could be a former applicant who eventually disappeared without a trace. Some of the group identify their own suspect outside of the house, making life easier for themselves. The commissioners, however, are not willing to be influenced by aura and gut feeling. Rather, it makes you thinkthe missing applicant of all people had caused a stir among some of the residents...
Dietrich Brüggemann and Daniel Bickermann, who have already written "Tatort: Stau" for the Stuttgart team of inspectors, also tie in with this script in everyday life: housing is a pressing issue, especially in the Stuttgart area. The home builders in "Tatort: That is our house" are not only concerned with their own roof over their heads, but above all with the dream of living together. An ideal that, after the lengthy development phase of their project, now has to prove itself in reality and is also being put to the test by dealing with the commissioners. And for Lannert and Bootz, too, the investigation in a milieu in which their very own ways of thinking are anchored is a test, even if it is above all a test of patience.