COVID-19 brought the threat of unknown viruses to global attention. This documentary, an international co-production with France, explores what's necessary to prevent another pandemic. Scientists assert that pandemics are inevitable under an international capitalistic economy. The risk from zoonotic diseases — those passed from animals to humans, such as bird flu is particularly high. The program reports on experts known as "virus hunters," working all around the world. We see how deforestation and poaching are contributing to the spread of viruses.