A man and his ship are sunk in Lake Constance and the dead man's son is missing. For the detectives, he is the prime suspect. Until an anonymous tip-off about a prisoner hidden in a box turns up...
| Actor | Role |
|---|---|
| HHayal KayaElena Barin | Elena Barin |
| JJulian BayerAchim Schatz | Achim Schatz |
| AAliki HirschBritta Heinemann | Britta Heinemann |
 Florian KleineHanno Kienle | Hanno Kienle |
 Tilman StraussLars Reimann | Lars Reimann |
 Lasse MyhrStefan Eisel | Stefan Eisel |
 Janina ElkinMelanie | Melanie |
 Julia BeckerEva Raddatz | Eva Raddatz |
 Sithembile MenckDr. Müller | Dr. Müller |
 Irene RindjeCoroner | Coroner |
 Julian TrostorfHenry Budde | Henry Budde |
| FFritz BruderekFriedrich | Friedrich |
| BBruno GrünerMatze | Matze |
 Finnlay BergerStefan | Stefan |
| MMauritz StraufMoritz | Moritz |
| SSilvan MindaLars | Lars |
 Maximilian DirrChristian | Christian |
 Florian RummelPoliceman | Policeman |
| RRuby Ann RawsonNadeschka | Nadeschka |
| JJudith SchäferMrs. Stadler | Mrs. Stadler |
| TThomas TruongChan-Wook | Chan-Wook |
| MMichael KrauseHerbert Schneider | Herbert Schneider |
| EEllalotte HaaseEva Raddatz | Eva Raddatz |
 Barbara Colceriu(uncredited) | (uncredited) |