For organic farmer Andi Gruber, the single father of his eleven-year-old daughter Lena, his world suddenly collapses when it turns out that his cattle are contaminated with harmful substances and have to be slaughtered by the authorities. His livelihood is threatened. He desperately tries to find out what the pollutants are and how his cattle could have been contaminated. He goes to biochemist Dr. Kroetz and finds him dying, fatally wounded by a bolt gun. As Andi was seen at the scene of the crime, he is suspected of murder and is wanted. After he knows his daughter Lena is safe with his sister on the neighboring farm, Andi takes up the fight. With the help of young scientist Silvie Kraus, he discovers that an entire cartel of abattoir operators, chemical companies, vets and politicians are apparently testing new vaccines on the farmers' livestock without their knowledge and are not even afraid of murder.

Nuclear security expert Katja Wernecke (Ulrike Folkerts) helps cover up a fire in the German nuclear reactor she works in, before the government takes a decision on extending the usage license for it. But the press uncovers it. PR man Steffen Stratmann (Matthias Koerbelin) is brought in to improve the companies image - but before he can implement his plan a nuclear meltdown occurs. 2m people have to be evacuated. Wernecke re-enters the hot zone to investigate the cause...