The young doctor of sciences, Dr , who has hair and eyes, is doing research in the pursuit of a treatment for a mysterious virus. When her former doctoral supervisor, Professor , dies in Barcelona as a result of this virus, and when her former fellow student, is shot in an attempted assassination, she herself is drawn into the maelstrom of events. A young German medical doctor, Dr , with hair and eyes, is at 's side although by doing so, he puts himself in great danger because Professor , head of the research department in Berlin, and his accomplice, Dr , are doing everything to carry out their plan. The plan, however, has loopholes. One of these is the fact that , nightwatchman at the Icelandic branch of the pharmaceutical firm and the first fatality as a result of the virus, left incriminating documents with his family. His widow and his little boy are the unwitting custodians of these crucial papers. Other characters include , the security manager at the pharmaceutical firm and mistress of the head of the research department, who is actually in love with , the police inspector who is long been investigating the pharmaceutical company she works for. Even , the heroine's best friend, does not stand there idly. In concert with 's colleagues, the police inspectors and , they finally manage to uncover the real culprits in this scandal...