Ingo Lenssen takes on a dubious organ dealer aftern nine-year-old “Mücke”, the son of former colleague Tekin Kurtuluş and Lenssen's godchild, is hit by a car and his life is in danger. As Tekin threatens the driver of the car with retaliation and he is injured in an attack shortly afterwards, the ex-investigator comes under suspicion. In order to exonerate their former colleague, Ingo Lenßen and his colleagues begin an unauthorized investigation.
| Actor | Role |
|---|---|
| IIngo LenßenIngo Lenßen | Ingo Lenßen |
| CChristian StormChristian Storm | Christian Storm |
 Dominik TiefenthalerMarkus Berger | Markus Berger |
| TTekin KurtulusTekin Kurtulus | Tekin Kurtulus |
| SSandra CorziliusKatja Hansen | Katja Hansen |
| SSebastian JägerSebastian Thiele | Sebastian Thiele |
| HHubert BurczekHans | Hans |
| OOskar LorenzNiko Berger | Niko Berger |
| SSandra Zirngibl-KowalskiSandra Nitka | Sandra Nitka |