S1, E1: A body is discovered in the Spree River, revealing a chilling crime. The victim, once employed at a logistics company, had found love amid the bustling workplace, yet this very environment might have also introduced him to his killer. Struggling with the unresolved case, department head Katharina Koblinski seeks assistance from the retired Chief Inspector Robert Heffler. Heffler, driven by a sense of duty and a sharp intuition, must navigate the complexities of the victim's life and relationships to uncover the truth behind the murder that shrouds Berlin in mystery.