Humans and many alien races live together in a prosperous interstellar metropolis called Alpha, the City of a Thousand Planets. For hundreds of years, Alpha, the City of a Thousand Planets, has become a wonderful paradise where all races live in peace and prosperity. Valerian (Dane DeHaan) and Laureline (Cara Delevingne) were chosen to be the guardians of Alpha. They are both executives of the Guard Department and are appointed to intercept the transaction of a rare item. This rare item has a mysterious connection with a rare race that should have disappeared decades ago. Then they came to the huge Alpha City, the City of a Thousand Planets, when their commander Arun Filitt (Clive Owen) was kidnapped in the command center, and the pair began to realize the unusual value of the items in their hands. The two pursued the murderer and found themselves caught in a brewing interstellar event...