In the 28th century, Valerian (Dane DeHaan) and Laureline (Cara Delevingne) are a team of special operatives tasked with maintaining order throughout human territories. The Minister of Defense assigns them a mission that will take them to the extraordinary city of Alpha – an ever-expanding metropolis where diverse species from across the universe have converged over centuries to share knowledge, intelligence, and culture. A mystery lies at the heart of Alpha, a dark force threatening the peace of the City of a Thousand Planets, and Valerian and Laureline must race against time to identify the threat and safeguard not only Alpha, but the future of the entire universe.