What are the chances that, one day, we will discover on some distant extragalactic planet an ecosystem similar to ours on Earth? A planet on which life would have appeared in shapes as complex and diverse as it did on Earth? Relying on the work of astronomers, cosmologists and biologists, our film takes us on an exploratory journey to the heart of our solar system, revealing the incredible, even improbable chain of events that resulted in the emergence of life on Earth.