Berlin is sexy, deadly and dangerous. The German capital is not only a party mecca, it tops in crime and murder, as well. Inspectors Nina Rubin and Robert Karow are big-city homicide cops and an uneven duo: Nina is a hothead who tends to explode when confronted with individual injustice, while Robert is a cool, rational thinker with a healthy dose of mistrust for anyone and anything.

Their murder cases lead them behind the scenes of glamorous Berlin, while a certain unsolved case hangs over it all, putting their partnership to the test: Robert was transferred from the narcotics department, where he has a shadowy history: Robert's former partner was found shot, and the murder weapon was found on Robert. As they tackle brutal killings amid Berlin's pulsating nightlife and shadowy underworld, their clashing styles—Nina's fiery passion versus Robert's calculated skepticism—forge a tense synergy, unraveling high-profile crimes tied to the city's glittering yet perilous facade.

The lingering mystery of Robert's past partner continuously strains their alliance, blending procedural intensity with personal suspicion in a web of deception. Market leader on ARD prime time with up to 10 million viewers and a market share of approx. 27%.