While the youth uprising sweeps across Europe, a debate about Franz Kafka appears in student magazines, arguing that publishing the texts Kafka left behind against his will is unfaithful to his legacy. When Kafka's best friend, Brod, is injured in an attempted assassination, assailant Ferdy Kaplan is captured and questioned by Commissioner Muller at the West Berlin police station. As his interrogation progresses, Kaplan's background is revealed piece by piece, from the love story between him and his childhood friend Amalya, to their shared passion for Kafka, which leads them to join a radical group. But when a shocking discovery is made about the person who ultimately set Brod's attempted murder in motion, Kaplan and Muller agree to work together to expose the truth.