What can a simple DNA test do? For example, it can trigger an avalanche of surprising findings that will shake up the fates of parents and their adult children. The secrets revealed can hurt many, but they can also bring a lot of new possibilities. Because what's better than having good siblings? And does the rule "the more, the better" apply in this case too?

Jiří Markovic thought capturing Ladislav Hojer would be the defining case of his career. He was wrong. As communist Czechoslovakia prepares for the 1985 Spartakiad, an unpredictable serial killer terrorizes Prague. Under intense pressure from state authorities, Markovic and his team race against time to stop a murderer the entire country fears, testing the limits of justice, politics, and morality.