The new case confronts young detective Lila Ziegler once again with aspects of human coexistence that are not often thought about: The head of the home care service Sonnenschein has noticed a striking increase in the number of deaths in the Bochum area. Lila and her partner Ben Danner immerse themselves in the caregiver team to investigate the matter. Soon, they realize that there are many good reasons to wish death upon a care recipient. However, they do not find any concrete leads. Through a blog on the internet, Lila discovers surprising sides of her current colleagues, but she increasingly rules out the possibility that any of them is a murderer. Not only is the case not progressing well, but Lila also receives an unwelcome visitor: One evening, her brother shows up at her door, and he is not coming in peace.