The body was found dead on the tracks, electrocuted. The autopsy confirmed what some had always feared, that we are not alone in the universe - and that even now, some visitors are still at large. This started the investigation that revealed the starling story of four stranded aliens and their desperate struggle for survival. Fallen from the stars, they started with nothing more than a first-aid kit and instincts. Fighting their own insecurities and prejudices, they slowly blended their way into a primitive society they found to be at once brutal, accepting abusive and opportunistic. But when one of them trades technological advancements for personal wealth and protection, he risks blowing all their covers - and sets in motion a chain of political machinations that could alter the course of history.