Johann Friedrich von Allmen and his partner Carlos get caught up in a new adventure in which the disappearance of a very valuable koi plays a crucial role.
| Actor | Role |
|---|---|
 Heino FerchJohann Friedrich von Allmen | Johann Friedrich von Allmen |
 Samuel FinziCarlos | Carlos |
| DDavid LifschitzVittorio Giuninazzi | Vittorio Giuninazzi |
 Andrea OsvártJoelle „Jojo“ Hirth | Joelle „Jojo“ Hirth |
 Isabella ParkinsonMaria Moreno | Maria Moreno |
 Uwe KockischSteve Garrett | Steve Garrett |
 Falilou SeckFreddie Turnbill | Freddie Turnbill |
 Alejandro BarriosBajrush | Bajrush |
 Edita MalovčićDr. Akina de la Vega | Dr. Akina de la Vega |
 Jörg WitteVale | Vale |
 Michaela RosenHelen Lifehouse | Helen Lifehouse |
 Eduardo VelascoFernando | Fernando |
 Andy FukutomeYuma | Yuma |