During her research into the fatal bridge collapse, lawyer Maryam Soltani (Mona Pirzad) was attacked and threatened in her office. She got too close to the truth. But who is responsible for the disaster and the attack? The deeper police officer Ali Zeller (Ken Duken), his brother Leo (Fabian Busch) and Maryam delve into the search for the perpetrators, the tighter the noose around them tightens.

After Ali and Leo cross boundaries in their investigation, they have to do everything they can to cover their tracks. But they get in the way of Edda Münch (Nadeshda Brennicke), who shows no mercy in the search for her missing son and also brings drug lord Rainer Lanski (Daniel Zillmann) into the Zeller brothers' sights. When a mysterious killer (Stephan Luca) shows up in Munich and sabotages the investigation into the bridge collapse in court, the situation for Ali, Leo and Maryam seems increasingly hopeless.