Virus alert in Cologne: a deadly influenza pathogen has been released. Shortly afterwards, Sonja Kessler finds her husband Reinhard, a virus researcher, dead in their apartment. Everything points to suicide, but an unusual trail leads her and her stepson Jan to an apartment rented by Reinhard. Reinhard was apparently secretly researching a deadly virus there.
| Actor | Role |
|---|---|
 Ann-Kathrin KramerSonja | Sonja |
 Robert StadloberJan | Jan |
 Reiner SchöneWerner Nielsen | Werner Nielsen |
 Max HerbrechterReinhard Kessler | Reinhard Kessler |
 Charlotte SchwabInspector Rudolph | Inspector Rudolph |
 Claus Dieter ClausnitzerClaus Steenbeck | Claus Steenbeck |
 Ute WillingDr. C. Schoof | Dr. C. Schoof |
 Denis MoschittoOlaf | Olaf |
| AAndreas WindhuisBusmann | Busmann |
| GGeorg PrangArnold | Arnold |
| DDirk BöhlingJournalist | Journalist |
 Herbert SchäferReporter | Reporter |
| SSabine WackernagelCleaning Lady | Cleaning Lady |