On 26 March 1945, U.S. troops liberated Hadamar—one of Nazi Germany’s secret killing centers—uncovering horrific conditions inside a psychiatric facility turned into a site of systematic murder. Among those arrested was Karl Willig, a deputy head nurse who played a direct role in the abuse and killing of vulnerable patients.

This documentary explores how Nazi “euthanasia” policies transformed medical institutions into instruments of death, and how ordinary staff became participants in mass murder. From forced sterilizations to lethal injections and starvation, Hadamar became a symbol of one of the regime’s earliest organized killing programs.

Willig’s story reveals the brutal reality behind the Nazi T4 program—and how those responsible ultimately paid for their crimes.