17. King in Yellow

Charlotte Lindholm's latest case takes her to Kleinhude in Lower Saxony – to a so-called dementia village, where people with dementia are given the opportunity to lead normal everyday lives. One of the residents, the universally popular Mr. König, is suspected of being a serial killer who has murdered seven people. At least, that's what Chief Inspector Vogel claims. Furious that no one believes him, Vogel asks Charlotte Lindholm for help. But Vogel, too, has a secret – just like the management of the dementia village. As her investigation unfolds, Charlotte herself begins to doubt her own memory. But she's not mistaken: there are several suspects.