On a morning in March 2015, the Danish police received a call from a nurse at Nyk ø bing Falster Hospital. She suspects that her close colleague intentionally killed the patient and is worried that this situation will happen again. Soon, a murder case unfolded, unprecedented in Danish legal history. Several colleagues are now telling the police that they also suspect that the nurse poisoned the patient, and some even say that they have been walking around with this suspicion for several years. But why didn't anyone respond? Where is the evidence?