SOKO Donau is an Austrian television series.

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.

In the middle of the mountain wilderness of the Alps, a glowing meteorite strikes a glacier and brings a Neanderthal boy frozen in ice back to life. This boy, Bataa, meets Sophie, a girl who has run away from a vacation cabin in the mountains. At first, the two seem separated by language and time, but they quickly discover they have things in common: Sophie has lost her mother and cannot find her place in her new blended family, and Bataa also feels abandoned and longs for his family.