Alois Meininger, a convicted murderer, is released from preventive detention after more than 30 years, commits another murder and goes into hiding. No one can provide any clues as to where he might be staying - the last hope lies with his former therapist Norbert Prinz, who is now suffering from dementia. But how can you interview someone with dementia? A criminological pilot project is started in cooperation with the renowned neuropsychologist Prof. Vonderheiden: The former practice room is to be resurrected as a backdrop and the demented test person is to be led inside. The inspectors hope to be able to elicit valuable information from him. But in the course of the experiment, Batic and Leitmayr revealed deeper abysses than initially assumed.
—ARD Das Erste