Raza is being infiltrated as an informant by anti-terror investigators Gabriel and Holly, who are increasingly drawn into suspicious circles. There, it is suspected that drug dealer Gol Rahmani, alias "Big Shot," is planning a terrorist attack on the Hamburg Elbphilharmonie. Raza is becoming increasingly self-confident, allowing his old life to fade further into the background. Investigator Gabriel knows this temptation all too well: He finds it difficult to separate himself from his identity as an undercover investigator in neo-Nazi circles. As "Charlie", he visits his old "friends". His wife Emilia discovers that her husband never truly ended an affair in the right-wing extremist scene. Seeking help, she turns to Holly to learn more, but she remains silent about Gabriel's secrets. Both Gabriel and Raza must make decisions in their parallel lives that have serious consequences...

It's the day of the big concert at the Elbphilharmonie, but the investigative team is no longer there: Holly has been removed from the case due to serious errors in the investigation, and Gabriel is taking the reins himself to prevent the attack in his own way. At the same time, his old identity, "Charlie", is getting dangerously close to his family. Holly now wants to meet with Gabriel's wife and confide in her the whole truth about her former investigative partner's second identity. Events are unfolding rapidly. Are the personal problems of Gabriel, Raza, and Holly taking so much of a role that they're losing sight of what's important?