In the 28th century, Valerian and Laureline are special operatives charged with keeping order throughout the human territories. On assignment from the Minister of Defense, the two undertake a mission to Alpha, an ever-expanding metropolis where species from across the universe have converged over centuries to share knowledge, intelligence, and cultures. At the center of Alpha is a mysterious dark force which threatens the peaceful existence of the City of a Thousand Planets, and Valerian and Laureline must race to identify the menace and safeguard not just Alpha, but the future of the universe.
From 1957 —the year in which the Soviets put the Sputnik 1 satellite into orbit— to 1969 —when American astronaut Neil Armstrong walked on the surface of the moon—, the beginnings of the space conquest were depicted in popular culture: cinema, television, comics and literature of the time contain numerous references to an imagined future.
Another planet in the period of medieval times. An employee of the institute of experimental history from Earth, who is send under the name of noble don Rumata of Estor as a spy with a mission to contact the local resident of the institute, arrives in the city of Arkanar. But the resident perishes under an unlucky attempt to make a palace coup, and Rumata have to take his place as the resident. Soon he meets all the horrors of the medieval society - a peasant war, palace coups, mass executions. To continue to be an indifferent watcher of all these horrors turns out to be simply impossible...
In an imaginary dictature of a futuristic world, rebellion has broken out. The men in power scramble to the Bunker Palace Hotel, a bunker built long ago for just this kind of contingency. But a rebel spy sneaks in, and although her nature is very quickly suspected, she is left to observe the raving of the decadent power class, who keeps wondering what happened to their leader, who has failed to show up.