Children are always expensive. Isa’s parents had already paid 22,000 euros for his little son when he was not even born yet. But what they achieved with this cannot be compensated for with money: Frederik, now three and a half years old, is a completely normal, healthy boy. Family remains anonymous, his name and that of his mother have been changed. Normal and healthy – for Frederik, that means a lot more than for other children. It is said that he will never fall victim to the fatal disease that broke out in his grandfather long ago and that will also affect his mother Isa at some point: Huntington’s chorea. A hereditary, always fatal nervous disease. For more than 150 years, this serious illness has been a hopeless diagnosis. And up to now, there is only one way to avoid this fate: to rule out heredity from the outset, as was the case with Frederik.